This commit adds `OMNIBUS_RUBY_VERSION` and `CNG_RUBY_VERSION` to
define which versions are used in the Omnibus and CNG projects.

Previously the Ruby versions used in the child pipelines for building
Omnibus and CNG was determined based on the image used in the
respective CI jobs. When we bumped the CI image to 3.1.5 in
https://gitlab.com/gitlab-org/gitlab-build-images/-/merge_requests/803,
this quietly added a requirement to Omnibus that Ruby 3.1.5 had to be
supported. At the same time, the `build-cng` image used Ruby 3.1.4, so
https://gitlab.com/gitlab-org/build/CNG-mirror/-/jobs/6821715942
started to fail once CNG stopped building Ruby 3.1.4.

While the latter case needed
https://gitlab.com/gitlab-org/build/CNG/-/merge_requests/1828, we can
at least avoid the first problem by explicitly setting the version
needed. In an ideal world, these variables would be determined
automatically from the upstream projects. However, setting these
variables avoids surprise failures and opens the possibility up for
automation to update these values.

Extra placeholder user validation

See merge request https://gitlab.com/gitlab-org/gitlab/-/merge_requests/152499



Merged-by: Bala Kumar <sbalakumar@gitlab.com>
Approved-by: Joseph Wambua <jjoshua@gitlab.com>
Approved-by: Bala Kumar <sbalakumar@gitlab.com>
Co-authored-by: James Nutt <jnutt@gitlab.com>

This MR helps to ensure that the placeholder user creator never creates
a `User` record which will fail to save due to validation errors.

Remove FF `do_not_use_exclusive_lease_for_user_activity_service`

See merge request https://gitlab.com/gitlab-org/gitlab/-/merge_requests/152168



Merged-by: Doug Stull <dstull@gitlab.com>
Approved-by: Doug Stull <dstull@gitlab.com>
Co-authored-by: Manoj M J <mmj@gitlab.com>

Fix Performance/StringInclude offenses

See merge request https://gitlab.com/gitlab-org/gitlab/-/merge_requests/151303



Merged-by: Michael Kozono <mkozono@gitlab.com>
Approved-by: Bishwa Hang Rai <bhrai@gitlab.com>
Approved-by: Michael Kozono <mkozono@gitlab.com>
Reviewed-by: Bishwa Hang Rai <bhrai@gitlab.com>
Co-authored-by: Raj Sodhi <raj.sodhi@nyu.edu>

Improve development docs regarding managing RubyGems.org footprint

See merge request https://gitlab.com/gitlab-org/gitlab/-/merge_requests/144768



Merged-by: Ahmed Hemdan <ahemdan@gitlab.com>
Approved-by: Philippe Lafoucrière <30915-plafoucriere@users.noreply.gitlab.com>
Reviewed-by: Philippe Lafoucrière <30915-plafoucriere@users.noreply.gitlab.com>
Reviewed-by: Rémy Coutable <remy@rymai.me>
Reviewed-by: Ahmed Hemdan <ahemdan@gitlab.com>
Co-authored-by: Philippe Lafoucrière <30915-plafoucriere@users.noreply.gitlab.com>
Co-authored-by: Rémy Coutable <remy@rymai.me>
Co-authored-by: Jayson Salazar Rodriguez <mail@jdsalaro.com>

Add GraphQl option to sort CI catalog resources by usage count

See merge request https://gitlab.com/gitlab-org/gitlab/-/merge_requests/151977



Merged-by: drew stachon <730684-drew@users.noreply.gitlab.com>
Approved-by: Lysanne Pinto <lpinto@gitlab.com>
Approved-by: Ethan Urie <eurie@gitlab.com>
Approved-by: Alper Akgun <aakgun@gitlab.com>
Approved-by: Rajendra Kadam <rkadam@gitlab.com>
Approved-by: drew stachon <730684-drew@users.noreply.gitlab.com>
Reviewed-by: Rajendra Kadam <rkadam@gitlab.com>
Co-authored-by: lma-git <lma@gitlab.com>

Add anthropic version header to experimentation api

See merge request https://gitlab.com/gitlab-org/gitlab/-/merge_requests/152461



Merged-by: Alejandro Rodríguez <alejandro@gitlab.com>
Approved-by: Ian Baum <ibaum@gitlab.com>
Approved-by: Alejandro Rodríguez <alejandro@gitlab.com>
Reviewed-by: Ian Baum <ibaum@gitlab.com>
Reviewed-by: Hunter Stewart <hustewart@gitlab.com>
Co-authored-by: Michael Thomas <micthomas@gitlab.com>

Co-authored-by: Ian Baum <ibaum@gitlab.com>

Fix Lint/AmbiguousOperatorPrecedence 17 offenses

See merge request https://gitlab.com/gitlab-org/gitlab/-/merge_requests/151166



Merged-by: Bogdan Denkovych <bdenkovych@gitlab.com>
Approved-by: Oksana Kohuch <oksanakohuch-ext@gitlab.com>
Approved-by: Bogdan Denkovych <bdenkovych@gitlab.com>
Co-authored-by: Archish <archishthakkar@gmail.com>

Changelog: other

Adding Getting started to list

See merge request https://gitlab.com/gitlab-org/gitlab/-/merge_requests/152678



Merged-by: Amy Qualls <aqualls@gitlab.com>
Co-authored-by: Suzanne Selhorn <sselhorn@gitlab.com>

Begin revisions of Git LFS page

See merge request https://gitlab.com/gitlab-org/gitlab/-/merge_requests/152451



Merged-by: Phillip Wells <pwells@gitlab.com>
Approved-by: Phillip Wells <pwells@gitlab.com>
Reviewed-by: Kaitlyn Chappell <kmchappell@gitlab.com>
Co-authored-by: Amy Qualls <aqualls@gitlab.com>

Nowhere near finished, but this commit starts rearranging a lot of
content on the page to bring it closer to our expected task format.

Adding Getting started to top-level page

See merge request https://gitlab.com/gitlab-org/gitlab/-/merge_requests/152676



Merged-by: Amy Qualls <aqualls@gitlab.com>
Approved-by: Amy Qualls <aqualls@gitlab.com>
Co-authored-by: Suzanne Selhorn <sselhorn@gitlab.com>

Update old CI/CD youtube links on doc site

See merge request https://gitlab.com/gitlab-org/gitlab/-/merge_requests/152677



Merged-by: Amy Qualls <aqualls@gitlab.com>
Co-authored-by: Allie Klatzkin <aklatzkin@gitlab.com>

Removes database migrations up to 16-2-stable-ee

See merge request https://gitlab.com/gitlab-org/gitlab/-/merge_requests/149003



Merged-by: Jon Jenkins <jjenkins@gitlab.com>
Approved-by: Jon Jenkins <jjenkins@gitlab.com>
Approved-by: Matt Kasa <mkasa@gitlab.com>
Approved-by: Nao Hashizume <nhashizume@gitlab.com>
Co-authored-by: Leonardo Rosa <ldarosa@gitlab.com>

Pre-16.3 migration files were removed and schema
changes moved to db/init_structure.sql file

Changelog: other

Updating layout of features

See merge request https://gitlab.com/gitlab-org/gitlab/-/merge_requests/152643



Merged-by: Phillip Wells <pwells@gitlab.com>
Approved-by: Phillip Wells <pwells@gitlab.com>
Co-authored-by: Suzanne Selhorn <sselhorn@gitlab.com>
Co-authored-by: Jonathan Glassman <jglassman@gitlab.com>

To see if the content can be easier to scan

Updating to match the left nav

See merge request https://gitlab.com/gitlab-org/gitlab/-/merge_requests/152670



Merged-by: Phillip Wells <pwells@gitlab.com>
Approved-by: Phillip Wells <pwells@gitlab.com>
Co-authored-by: Suzanne Selhorn <sselhorn@gitlab.com>

E2E cleanup: fix deletion errors and fail at the end

See merge request https://gitlab.com/gitlab-org/gitlab/-/merge_requests/152244



Merged-by: Chloe Liu <yliu@gitlab.com>
Approved-by: Chloe Liu <yliu@gitlab.com>
Reviewed-by: Chloe Liu <yliu@gitlab.com>
Co-authored-by: Desiree Chevalier <dchevalier@gitlab.com>

Fix error on deleting exclusions and limit creating exclusions

See merge request https://gitlab.com/gitlab-org/gitlab/-/merge_requests/152634



Merged-by: Gavin Hinfey <ghinfey@gitlab.com>
Approved-by: Joe Woodward <jwoodward@gitlab.com>
Approved-by: Jon Jenkins <jjenkins@gitlab.com>
Approved-by: Gavin Hinfey <ghinfey@gitlab.com>
Co-authored-by: j.seto <jseto@gitlab.com>

Add reference to configuring multiple storage paths

See merge request https://gitlab.com/gitlab-org/gitlab/-/merge_requests/152655



Merged-by: Amy Qualls <aqualls@gitlab.com>
Approved-by: Amy Qualls <aqualls@gitlab.com>
Co-authored-by: Edward Hilgendorf <ehilgendorf@gitlab.com>

Remove double border on todo row hover

See merge request https://gitlab.com/gitlab-org/gitlab/-/merge_requests/152416



Merged-by: Annabel Dunstone Gray <annabel.dunstone@gmail.com>
Approved-by: Sascha Eggenberger <seggenberger@gitlab.com>
Approved-by: Angelo Gulina <agulina@gitlab.com>
Approved-by: Jose Ivan Vargas <jvargas@gitlab.com>
Reviewed-by: Annabel Dunstone Gray <annabel.dunstone@gmail.com>
Reviewed-by: Angelo Gulina <agulina@gitlab.com>
Reviewed-by: Sascha Eggenberger <seggenberger@gitlab.com>

Make Claude 3 the default model in Duo

See merge request https://gitlab.com/gitlab-org/gitlab/-/merge_requests/152544



Merged-by: Jessie Young <jessieyoung@gitlab.com>
Approved-by: Gosia Ksionek <mksionek@gitlab.com>
Approved-by: Jessie Young <jessieyoung@gitlab.com>
Reviewed-by: Nicolas Dular <ndular@gitlab.com>
Co-authored-by: Małgorzata Ksionek <mksionek@gitlab.com>
Co-authored-by: Nathan Weinshenker <nweinshenker@gitlab.com>

Slash commands and issue/epic-related questions will now use Claude 3. 
Documentation questions and CI editor generation still use Claude 2.1.

Changelog: changed
EE: true

Use `let_it_be_with_refind` to fix failing specs

See merge request https://gitlab.com/gitlab-org/gitlab/-/merge_requests/152573



Merged-by: Ethan Urie <eurie@gitlab.com>
Approved-by: Ethan Urie <eurie@gitlab.com>
Co-authored-by: Abdul Wadood <awadood@gitlab.com>

Add attributes for visual indicators on imported items

See merge request https://gitlab.com/gitlab-org/gitlab/-/merge_requests/152496



Merged-by: Miranda Fluharty <mfluharty@gitlab.com>
Approved-by: Minahil Nichols <minahilnichols@gitlab.com>
Approved-by: James Nutt <jnutt@gitlab.com>
Approved-by: Miranda Fluharty <mfluharty@gitlab.com>
Reviewed-by: Evan Read <eread@gitlab.com>
Reviewed-by: Luke Duncalfe <lduncalfe@gitlab.com>
Reviewed-by: Justin Ho Tuan Duong <hduong@gitlab.com>
Reviewed-by: James Nutt <jnutt@gitlab.com>
Co-authored-by: Justin Ho Tuan Duong <hduong@gitlab.com>

Issues, Epics, MRs. Verified that Notes and User activities work
as expected.

Changelog: changed

Ensure vendor gems child pipeline runs with gitlab-org runners

See merge request https://gitlab.com/gitlab-org/gitlab/-/merge_requests/152527



Merged-by: Nao Hashizume <nhashizume@gitlab.com>
Approved-by: Stan Hu <stanhu@gmail.com>
Approved-by: Nao Hashizume <nhashizume@gitlab.com>
Reviewed-by: Nao Hashizume <nhashizume@gitlab.com>
Co-authored-by: Jennifer Li <jli@gitlab.com>

Use full-width for both inline and side-by-side diffs in compare

See merge request https://gitlab.com/gitlab-org/gitlab/-/merge_requests/152432



Merged-by: Payton Burdette <pburdette@gitlab.com>
Approved-by: Paul W <19602001-paintedbicycle-gitlab@users.noreply.gitlab.com>
Approved-by: Nataliia Radina <nradina@gitlab.com>
Approved-by: Payton Burdette <pburdette@gitlab.com>
Reviewed-by: Annabel Dunstone Gray <annabel.dunstone@gmail.com>
Reviewed-by: Nataliia Radina <nradina@gitlab.com>
Co-authored-by: Annabel Dunstone Gray <annabel.dunstone@gmail.com>