Remove code quality badge component and related specs
Remove feature flag checks from frontend conditionals
Remove feature flag yaml definition
Remove push_frontend_feature_flag
Remove tests for when the flag is disabled

Changelog: other
EE: true

This MR removes the use-deprecated-sizes property in gl-icon component
in app/assets/javascripts/vue_shared/components/file_icon.vue and
updates the size prop to use the valid size 16 in the relevant files

Changelog: other

This change adds a size to all gitlab-ui loading icons as part
of a migration effort to change the loading spinners default
size to "md".

This fixes a bug where if the user hovers the mouse over a different file
in the virtual scroller then the z-index bug for the more actions
dropdown appears again.

Closes https://gitlab.com/gitlab-org/gitlab/-/issues/335168

This happens because the virtual scroller re-uses components
so using the data property won't work.

Changelog: fixed

Instead of passing a boolean to the diff file header
Pass the array of code quality issues for that file
Then show those issues in a modal when the badge is clicked
Using the existing code quality issue body component

Add aria labels to provide accessible names for screen readers

See https://gitlab.com/gitlab-org/frontend/eslint-plugin/-/issues/18
for more information.

Sort JavaScript imports in the CE code
to match our future ESLint configuration.

Big wins:
 - Not hooked into the Vuex sequence / memory load
 - Results aren't cached!!

Verify it opens ALL files of a multiple file MR
and changes made in Web IDE are reflected in the MR
See https://gitlab.com/gitlab-org/quality/testcases/-/issues/997

GlIcon now automatically adds `aria-hidden` when there is no
aria-label, so we can remove code where aria-hidden is applied
to GlIcon.

GlIcon MR: https://gitlab.com/gitlab-org/gitlab-ui/-/merge_requests/1860

With unified diffs we only care about the inline diffs
However, when clicking show full file it ended up
creating a parallel array of diff lines.

Issue: https://gitlab.com/gitlab-org/gitlab/-/issues/218666

Issue: https://gitlab.com/gitlab-org/gitlab/-/issues/232817

Truncates files paths in diff file headers so that, when the path is too
long, it is truncated to prevent the copy to clipboard button from being
hidden.

Of course, this means that there's a bunch of logic
to coordinate the new flag with the original -
`automaticallyCollapsed` - flag.

In addition: the UI is updated to use the new flag
whenever it's been set, but to continue to fall back
to the old flag. This is primarily facilitated by a new
helper utility for diff files to do the resolution in a
single centralized place.

Of note: the diff_file is updated to depend on the
global store as the authoritative source of determining
whether the file is collapsed or not. The previous
version kept a local `isCollapsed` in sync with the
global store, which introduced a huge amount of
interwoven complexity. The update ingests the
resolved collapsed state from the store when
various observed properties update instead of
inverting that flow.

This is a full refactor of file collapsing.
Because the previous version was a single flag, then
modified with a user preference (file-by-file), there
were some issues including a THIRD possible way
that collapsing works. This update slightly simplifies
how collapsing works by depending more heavily
on the two flags stored in state and only modifying
them with the user preference when necessary.

GlDropdownSectionHeader

- Remove dropdown section header
- Change tooltip to "Options"

Closes https://gitlab.com/gitlab-org/gitlab/-/issues/260415

Ensure clipboard buttons that utilize the template
are styled correctly across the application

Non-DSL method calls should use brackets

Removes a couple of hover styles 
that are most of the time even overriden.

- This leaves a small inaccuracy since now the "manual" (user) collapsed
    files are toggling the "automatic" flag. This will be resolved in an
    upcoming merge request.

Cleans up the diff header by moving the action buttons
into a more actions dropdown.

Closes https://gitlab.com/gitlab-org/gitlab/-/issues/199725

- Adds a "Edit in Web IDE" action for the dropdown.
- Adds a "ide_edit_path" for the diff file entity.

Signed-off-by: Takuya Noguchi <takninnovationresearch@gmail.com>

This enables an eslint rule to prevent
usage of v-html to avoid potential
XSS vulnerabilities

This replaces all the usages of ~/vue_shared/components/icon.vue with
the corresponding GitLab UI component for all components from badges to
diffs (alphabetically).

In a previous MR [0] we already replaced the internal implementation
with the GitLab UI component. This should allow us to migrate all usages
without any test failures relating to the differences in their
implementation.

The actual deletion of the file will be done in a follow-up in case we
have missed an instance or someone introduces a new one in the
meanwhile.

[0]: https://gitlab.com/gitlab-org/gitlab/-/merge_requests/38778

This adds a user preference to view diffs file-by-file instead
of viewing all the diff files in one big list.
This helps with performance on large merge request,
but it can also be handy sometimes to view merge requests
file-by-file instead of in a full list of files.

The option to enable this feature is inside of user prefences.
For now this is also behind a feature flag so we can roll
this out safely.

https://gitlab.com/gitlab-org/gitlab/-/issues/222790

This replaces the append-right-5 utility
class for the gl-mr-2 class from GitLab-UI