Add GFM reference format for feature flags [RUN ALL RSPEC] [RUN AS-IF-FOSS]

See merge request gitlab-org/gitlab!53021

This commit adds the GFM reference format for feature flags.

docs: Object pools are supported for internal projects

See merge request gitlab-org/gitlab!53598

326d1ae5 delivered on object pools for
internal projects, on top of public ones. This change updates the
documentation to reflect that.

Cross-link and fix to-do items API page

See merge request gitlab-org/gitlab!53655

Fix ruby keyword warning in gitlab_experiment.rb

See merge request gitlab-org/gitlab!53444

Improve Tracking for 4 experiments in onboarding flow

See merge request gitlab-org/gitlab!53583

docs: Update secure eslint scanner with severity

See merge request gitlab-org/gitlab!53502

Fix doc to use the latest deployment template

See merge request gitlab-org/gitlab!53331

Initial idea for a front matter test

See merge request gitlab-org/gitlab!52844

Add the rudiments of a test that flags Markdown files in the doc/
directory that do not have front matter. Files without front matter
won't show up in the Technical Writing team's calculations.

This page was - bewilderingly - missing a cross-link back to the main
page about to-dos, and it was also using an older version of the
wording.

Fix.

Added docs for requesting a new review

See merge request gitlab-org/gitlab!53377

Remove a screenshot that is better handled by phrasing.
Convert narration to a procedure, and add some extra missing steps.
Move a subheading to the bottom of the page, as it's only required
for one version of GitLab.

Update rollout issue links for Code Review flags

See merge request gitlab-org/gitlab!53621

Fix test code snippet for tracking Redis events

See merge request gitlab-org/gitlab!53603

Add links from 2FA feature flags to affected features

See merge request gitlab-org/gitlab!53277

Database testing using thin-clones

See merge request gitlab-org/gitlab!51347

Relates to
https://gitlab.com/gitlab-org/database-team/team-tasks/-/issues/128

Apply new GitLab UI in create MR button and input from issue

See merge request gitlab-org/gitlab!53467

Use Gitaly keyset pagination to optimize branches page

See merge request gitlab-org/gitlab!53409

GraphQL: Add descriptions to ServiceTypeEnum

See merge request gitlab-org/gitlab!53515

Update testcase links in manage and secure specs

See merge request gitlab-org/gitlab!53636

Docs: Add link to coverage-fuzzing AFL example

See merge request gitlab-org/gitlab!53560

Track approver metrics for a merge request

See merge request gitlab-org/gitlab!53201

Update sidebartogglebutton Template

See merge request gitlab-org/gitlab!52680

The sidebartogglebutton Template produced invalid
HTML output, this commit fixes that.

Limit trial status widget experiment participants to group owners

See merge request gitlab-org/gitlab!52537

Add service to update Dast::Profile

See merge request gitlab-org/gitlab!51952

Add FREE badging to pages with CORE

See merge request gitlab-org/gitlab!53522

Make System OAuth app index table responsive and externalize text

See merge request gitlab-org/gitlab!50979

Update doc/administration/compliance.md

See merge request gitlab-org/gitlab!53606

As of 13.8, eslint now returns a severity, see
https://gitlab.com/groups/gitlab-org/-/epics/4004