Contributes to https://gitlab.com/gitlab-org/gitlab/-/issues/281835

**Problem**

Pull mirroring jobs retry to update mirrors even for hard failures
until they reach a retry limit. When a big external git hosting has a
persistent problem, then requests generated by update mirror jobs can
violate the acceptable error ratio and trigger an incident.

**Solution**

Identify unrecoverable failures and set a hard failure state for update
mirror jobs. Trigger an email to the customer notifying them about the
problem.

Jira Issue Detail page: Replace Jira private images with links

See merge request gitlab-org/gitlab!54098

Remove ci_mini_pipeline_gl_dropdown feature flag [RUN ALL RSPEC] [RUN AS-IF-FOSS]

See merge request gitlab-org/gitlab!53595

This change removes the ci_mini_pipeline_gl_dropdown feature flag
and related code.

Merge branch '321057-refine-the-user-interface-related-to-package-lists-and-the-search-bar' into 'master'

Refine Registry Lists and Search Bar UI

See merge request gitlab-org/gitlab!54549

- source
- tests

Migrate Epic Events when using Group Migration

See merge request gitlab-org/gitlab!54475

Remove obsolete DOMContentLoadedEventListener

See merge request gitlab-org/gitlab!54557

Resolve "Limit ProjectAuthorizations refresh jobs to "distinct" users." [RUN ALL RSPEC] [RUN AS-IF-FOSS]

See merge request gitlab-org/gitlab!54697

Proxy dependency proxy manifest content-type

See merge request gitlab-org/gitlab!53667

Move project repository storage classes to namespace

See merge request gitlab-org/gitlab!54793

Update Gitaly version

See merge request gitlab-org/gitlab!54828

Add requries_admin meta to mentions_spec

See merge request gitlab-org/gitlab!54816

Merge branch '296945-update-the-container-registry-ui-header-copy-to-remove-expiration-policy-text' into 'master'

Remove Expiration Policy text from container registry header

See merge request gitlab-org/gitlab!54665

- source
- tests

Add methods to find DAST profiles with given name

See merge request gitlab-org/gitlab!54235

Make Auto DevOps feature list into unordered list

See merge request gitlab-org/gitlab!54818

Add setting for enabling in product marketing emails

See merge request gitlab-org/gitlab!54324

Fix N+1 when validating groups

See merge request gitlab-org/gitlab!54774

Group migration: maintain import status across reloads

See merge request gitlab-org/gitlab!54567

Allow comparisons of branches across projects [RUN ALL RSPEC] [RUN AS-IF-FOSS]

See merge request gitlab-org/gitlab!51985

Move ZoomUrlValidator into Shared namespace

See merge request gitlab-org/gitlab!54205

Fix links in metrics_dictionary.md

See merge request gitlab-org/gitlab!54602

Added a missing class to reply placeholder

See merge request gitlab-org/gitlab!54817

Removes the validates_associated call which calls `#valid?` on each
runner of the group which triggers an N+1 query

This improves the validation for RunnerNamespace so that we don't need
to fire multiple SQL queries

Always run update-tests-metadata on schedule

See merge request gitlab-org/gitlab!54784

Geo: Fix duplicate Package File Registry rows

See merge request gitlab-org/gitlab!54654

* persist importState in localStorage

Prevent in product marketing emails frmo being sent
with this application setting

Correctly handle scenario when no top-level groups are available

See merge request gitlab-org/gitlab!54483

Migrate merge conflict views from HAML to Vue SFC

See merge request gitlab-org/gitlab!54698

Revised feature list for best practices.

Toggling file-by-file no longer updates the URL

See merge request gitlab-org/gitlab!54796

Merge branch '320800-get-gitlab_standard-url-from-the-backend-to-be-used-with-frontend-events' into 'master'

Get gitlab_standard data from the backend, to be used with frontend events

See merge request gitlab-org/gitlab!54009

Add IssuableFinder support for OR filtering of authors [RUN ALL RSPEC] [RUN AS-IF-FOSS]

See merge request gitlab-org/gitlab!54444