Ensures that the right shades are applied in dark mode.

Added a "glffc-" prefix to the Operations::FeatureFlagsClient token

Changelog: changed
MR: https://gitlab.com/gitlab-org/gitlab/-/merge_requests/144703

Deprecate `option` key for internal_events yaml

Currently if a user joins a GitLab instance via oAuth, LDAP, or SCIM and
their username begins with multiple `--` characters, these characters
are removed to ensure a valid username can be created for the new user.
Illegal characters such as `*&^()` are removed, and illegal extensions
such as `.git` and `.atom` are also removed.

This change extends the behavior to include all leading legal
characters: `-` , `_` and `.` . It also trims from the end of the
potential username, and removes consecutive legal characters so the
resulting username will pass the check for
`Gitlab::Regex.oci_repository_path_regex` .

Changelog: changed

Boolean and number input types were not be respected by CI
interpolation. They were being cast to strings when interpolated by
`gsub`. This commit fixes that by replacing the entire node with the
input value when the interpolation block is the entire length of the
node. In other cases, we can assume that the input is being inserted
into a string, so it's safe for us to use `gsub` to cast the value to a
string and perform the insertion.

This commit also ensures that the ability to match and replace multiple
interpolation blocks in a single node is not affected. A previous
attempt to fix this bug caused an incident because it only interpolated
the first block in a node.

Changelog: fixed
Issue: https://gitlab.com/gitlab-org/gitlab/-/issues/434826

This FF is already enabled on `gitlab.com` and it seems stable.

Related to https://gitlab.com/gitlab-org/gitlab/-/issues/413770

Changelog: performance

Changelog: added

- Add spec for supports_canceling?
- Fix pipeline feature spec and add an example
- Fix merge train auto merge service spec
- Consider a build retryable if canceling since
users should not need to wait for the after_script
to run to retry
- Fix cancel pipeline service spec
- Fix the cancel redundant pipelines service spec
- Fix create pipeline service spec
- Fix cancel redundant pipelines worker spec
Fix 2 more specs:
- spec/models/environment_spec.rb
- spec/workers/ci/cancel_pipeline_worker_spec.rb

The group 'application_performance' was renamed to 'cloud_connector'

https://gitlab.com/gitlab-org/gitlab/-/issues/415149

Changelog: changed
EE: true

It was enabled by default since 16.7,
and we only try to migrate clickhouse databases
if they are configured.

Related to https://gitlab.com/gitlab-org/gitlab/-/issues/434848+

Changelog: added

The group 'distribution' was renamed to 'distribution_deploy'

The service_desk_vue_list feature flag is default enabled
so we can delete it now and delete the legacy code

Changelog: other

Exceptions may occur in gems used by GitLab. This change makes it
possible to see exactly where the error occurred. By default,
filter only for GitLab code in `Gitlab::BacktraceCleaner` but
allow the default Rails backtrace cleaner to include gem code.

Changelog: changed

Changelog: performance

Changelog: changed

This publishes an EpicCreatedEvent and EpicUpdatedEvent which the
ValidateEpicWorkItemSyncWorker subscribes to. As part of the validation
we check if any attribute is different from the work item compared to
the epic.

We then log the attributes that mismatch as a warning. We do explicitly
not log the actual data to prevent leaking any sensitive information.

The group 'plan' was renamed to 'project_management'

Remove use_registry_api_to_list_tags feature flag and
add notice re: availability of it in docs

Changelog: changed

Changelog: added

The group 'integration' was renamed to 'import_and_integrate'

The group 'create' was renamed to 'source_code'

Introduce export_reduce_relation_batch_size feature flag to reduce
the export batch size for selected projects or groups.

Changelog: added

Contributes to https://gitlab.com/gitlab-org/gitlab/-/issues/441465

**Problem**

We use a hardcoded SHA1_EMPTY_TREE_ID value to detect the empty
repository tree. But SHA256 repositories have a different empty tree id.

**Solution**

Consider the repository object format for the empty tree id selection.

Changelog: other

This change introduces a new feature flag to replace the project
runner edit form with a Vue implementation.

Users will see a form that matches the design of the admin and group
runner forms.

Move the worker from Ai:: to CloudConnector:: namespace.

The group 'certify' was renamed to 'product_planning'

Contributes to https://gitlab.com/gitlab-org/gitlab/-/issues/437616

**Problem**

`ChangelogTagFinder` expected user to provide a version in semver
format (without v at the beginning). However, DEFAULT_TAG_REGEX allows
to use `v` at the start of the string.

As a result, `VersionSorter` cannot correctly sort versions and user
receives an error that the version is incorrect.

**Solution**

* Convert user specified version to format that `VersionSorter`
supports.
* Add test to verify that versions like `v1.0.0` are accepted.
* Update Changelog API documentation

Changelog: added

Changelog: changed

The group 'gitaly' was renamed to 'gitaly_cluster'

The group 'configure' was renamed to 'environments'

The group 'configure' was renamed to 'environments'

Add an ability to switch between two project export processes
by adding a new parallel_project_export feature flag

Changelog: added