Refresh feature flags documentation

Closes #62751

See merge request gitlab-org/gitlab-ce!29759

Split the FF docs in 3 separate docs to cover 3 different use-cases.

Attempt to work around migration spec failures by increasing parallelism

See merge request gitlab-org/gitlab-ce!30130

Docs: Update style guide for videos

See merge request gitlab-org/gitlab-ce!29683

- explictly say not to upload videos
- link videos from any YT account
- embed videos from GL's YT account only

Removes Database Reviewer template

See merge request gitlab-org/gitlab-ce!30128

It was moved to wwww-gitlab-com

Fix typo on end-to-end testing quick start guide

Closes gitlab-ee#12466

See merge request gitlab-org/gitlab-ce!30129

Removes EE differences for app/assets/javascripts/reports/components/report_item.vue

Closes gitlab-ee#12429

See merge request gitlab-org/gitlab-ce!30092

Avoid loading pipeline status in search results

See merge request gitlab-org/gitlab-ce!30111

Backport of EE MR

See merge request gitlab-org/gitlab-ce!30051

Fix unresponsive reply button in discussions

Closes #63200

See merge request gitlab-org/gitlab-ce!29936

Events listeners have been fixed to ensure UI interactions are
properly handled in discussion notes

Add a danger rule to suggest `docs-` prefixes

Closes #54490

See merge request gitlab-org/gitlab-ce!30115

This improves the performance of search, since the pipeline status
is not displayed.

Identified in https://gitlab.com/gitlab-org/gitlab-ce/issues/56627

Change GetRawChanges RPC to use bytes

Closes gitaly#1470

See merge request gitlab-org/gitlab-ce!28164

Improve accessibility tooling documentation

See merge request gitlab-org/gitlab-ce!30114

Fix background migrations failing with unused replication slot

Closes #63666

See merge request gitlab-org/gitlab-ce!30042

Add permission check to metrics dashboards

See merge request gitlab-org/gitlab-ce!30017

Adds permission checks to the metrics_dashboard endpoint. Users
with role of Reporter or above should have access to view the
metrics for a given project.

https://gitlab.com/gitlab-org/gitlab-ee/merge_requests/14320

If an MR only changes files within `doc/` we can save valueable CI time
by prepending a branch name with `docs-`. This danger rule helps educate
people about that fact.

On the other hand, if someone has a branch with a `docs` prefix or
suffix, the branch shouldn't contain any changes outside of the `docs`
directory

Removes EE differences for spec/javascripts/vue_mr_widget/mr_widget_options_spec.js

Closes gitlab-ee#12436

See merge request gitlab-org/gitlab-ce!30091

Enable Gitaly ref caching for SearchController

See merge request gitlab-org/gitlab-ce!30105

Fix styling for `app/assets/stylesheets/framework/notes.scss`

Closes #59884

See merge request gitlab-org/gitlab-ce!26879

Fix incorrect reaction placement in commit diff discussion

Closes #54595

See merge request gitlab-org/gitlab-ce!29445

Add links to useful browser extensions and learning resources to the
FE-accessibility documentation.

Update toast action selector

See merge request gitlab-org/gitlab-ce!30024

Updated the toast action selector to `first-of-type` instead

Unquarantine fixed tests

See merge request gitlab-org/gitlab-ce!30109

Conform related issues/MRs card to design docs

Closes #59594 and #61357

See merge request gitlab-org/gitlab-ce!29626

CE-EE parity for routes

See merge request gitlab-org/gitlab-ce!29994

Move Multiple Issue Boards for Projects to Core

See merge request gitlab-org/gitlab-ce!29757