Increase rate at which UpdateAllMirrorsWorker schedules jobs and reschedules itself

Closes #11874

See merge request gitlab-org/gitlab-ee!14573

Edit text, using correct terms

See merge request gitlab-org/gitlab-ce!30382

Added experimental languages to license management docs.

See merge request gitlab-org/gitlab-ce!29932

Prioritize CI mirrors

See merge request gitlab-org/gitlab-ee!14575

Fix failing e2e tests - initialize Issue labels

See merge request gitlab-org/gitlab-ce!30375

Add Action to Remove Project from Env Dashboard

See merge request gitlab-org/gitlab-ee!14563

Previously, UpdateAllMirrorsWorker would only reschedule itself when
enough mirrors were waiting to sync to fill up all available capacity.

By setting the next execution time in the past, they will be
prioritized before any other mirrors.

Fix top position of sticky file header on discussion tab

Closes #63976

See merge request gitlab-org/gitlab-ce!30410

Edit new text on visibility setting

See merge request gitlab-org/gitlab-ce!30281

Documentation: Update installation from source document

See merge request gitlab-org/gitlab-ce!30380

Line 170(make install) causes permission error.
This command should execute with sudo.

Remove unresolved class and fixed height in discussion header

See merge request gitlab-org/gitlab-ce!28440

Docs: Change even more absolute links to relative

See merge request gitlab-org/gitlab-ce!30387

Change assorted absolute links to ce and ee docs
to relative links

Fix broken EE master: Update jest snapshot

See merge request gitlab-org/gitlab-ee!14571

Removes EE differences for app/views/layouts/fullscreen.html.haml

Closes gitlab-ee#12550

See merge request gitlab-org/gitlab-ce!30403

Adding order by to list runner jobs api.

Closes #51794

See merge request gitlab-org/gitlab-ce!29629

Resolve "Notifications for CI Minutes quota limit approaching"

Closes #10283

See merge request gitlab-org/gitlab-ee!14328

Mutliple levels of notifications are suppoerted.
We just send the notification when a new level has been reached.

Backport of https://gitlab.com/gitlab-org/gitlab-ee/merge_requests/14328

See merge request gitlab-org/gitlab-ce!30003

This change was introduced with
https://gitlab.com/gitlab-org/gitlab-ce/merge_requests/30259

The Empty Regions component has one more property and thus taints this
snapshot. Just shows that we need a single code base and I should port
GitLab UI updates in the future.

Remove unused Gitaly feature flags

See merge request gitlab-org/gitlab-ce!30302

CE Port: Extend `MergeToRefService` to create merge ref from an arbitrary ref

See merge request gitlab-org/gitlab-ce!30361

Extend `MergeToRefService` to create merge ref from an arbitrary ref

See merge request gitlab-org/gitlab-ee!14298

The action `removeProject` was not mapped to the project button. It must
be mapped to the button to remove projects.