This schedules a background migration that checks whether
`multiple_merge_request_assignees` feature flag needs to
be enabled. The rule for it is that
every PopulateMergeRequestAssigneesTable background job
cannot be still running, or being retried or dead.

If there are any enqueued jobs in the state above, the
"checker" (MergeRequestAssigneesMigrationProgressCheck) will
be rescheduled for 3 hours ahead. If there are only dead jobs
in the queue (i.e. no scheduled/enqueued or retrying jobs), we
raise an error and stop the rescheduling.

Extract EE specific files/lines for spec/controllers/groups

Closes #6536

See merge request gitlab-org/gitlab-ee!10524

This is part of moving gitlab into single codebase.

Externalize strings in flash messages

See merge request gitlab-org/gitlab-ce!27106

- Externalize strings in controllers
- Update PO file

(EE port) Externalize strings in flash messages

See merge request gitlab-org/gitlab-ee!10641

- Externalize strings in controllers
- Update PO file

Add useful tips about big repositories

See merge request gitlab-org/gitlab-ce!27005

Adds EE folder in the stylelint command

See merge request gitlab-org/gitlab-ce!27058

EE: Adds EE folder in the stylelint command

Closes #10938

See merge request gitlab-org/gitlab-ee!10622

Fixes stylelint failures for EE specific code

Display maximum artifact size from runtime config

See merge request gitlab-org/gitlab-ce!26784

Resolve "Update DAST docs for specifying target URL via file"

Closes #10851 and #10914

See merge request gitlab-org/gitlab-ee!10610

Docs: Fix anchors related to variables doc

See merge request gitlab-org/gitlab-ce!27081

Docs: (EE Port) Fix anchors related to variables doc

See merge request gitlab-org/gitlab-ee!10633

Docs: Add missing redirects to /workflow and /articles docs (Only EE Docs)

Closes gitlab-com/gitlab-docs#349

See merge request gitlab-org/gitlab-ee!9872

This reverts commit baf0140e38c46f9dc4490e5445b062f4bddc7240

Add locations POROs for vulnerabilities

See merge request gitlab-org/gitlab-ee!10508

Move fingerprint logic into the location class for later reuse

Add doc when rspec-set won't work

See merge request gitlab-org/gitlab-ce!27050

Update dependency @gitlab/svgs to ^1.59.0

See merge request gitlab-org/gitlab-ce!27104

Update CE specific specs to match CE version

Closes #6121

See merge request gitlab-org/gitlab-ee!10637

Update RegExp syntax link to RE2

See merge request gitlab-org/gitlab-ce!27090

CI ref pattern matching now uses RE2 instead of Ruby.
See
https://about.gitlab.com/2019/04/01/security-release-gitlab-11-dot-9-dot-4-released/ for more information.

Track issues to epics promotions

Closes #8920

See merge request gitlab-org/gitlab-ee!10537

Resolve "Weight trainee maintainers higher in reviewer roulette"

Closes #60035

See merge request gitlab-org/gitlab-ce!27043

Extract create merge request quick action spec

Closes #59570

See merge request gitlab-org/gitlab-ce!26914

Remove extra line in `spec/models/merge_request_spec.rb`

Closes #6664

See merge request gitlab-org/gitlab-ee!10589