Update doc guidelines with markdownlint info

See merge request gitlab-org/gitlab-ce!32273

Move details of markdownlint mostly to the documentation
index for a SSoT, and link apropriately

Extract /internal/allowed API Actor logic out

See merge request gitlab-org/gitlab-ce!31564

EE->CE: Structure for "Require code owner approval on pushes"

See merge request gitlab-org/gitlab-ce!32607

These are the structural changes for supporting the EE feature of moving
"code_owner_approval_required" state from existing on a project to being
on the protected branches individually, allowing for CODEOWNER
validation on push events.

Add helper to wait for axios requests in frontend tests

Closes #60972

See merge request gitlab-org/gitlab-ce!30887

Add two methods to the axios_utils Jest mock:

- `waitFor(url)`, which returns a Promise that resolves when the
  next request to `url` finishes.
- `waitForAll()`, which returns a Promise that resolves when all
  pending requests finish.

Resolve "Migrate spec/javascripts/ide/components/preview/clientside_spec.js to Jest"

See merge request gitlab-org/gitlab-ce!32294

Refactor new undo_cleanup_concurrent_column_rename migration helper

See merge request gitlab-org/gitlab-ce!32343

- Move code for creating a new column from old into a function so that
it can be reused.
- Also add comments above the methods.

Merge branch '66150-remove-dynamically-constructed-feature-flags-starting-with-prometheus_transaction_' into 'master'

Resolve "Remove dynamically constructed feature flags starting with `prometheus_transaction_`"

Closes #66150

See merge request gitlab-org/gitlab-ce!32395

Makes custom Pages domain open as external link in new tab

Closes #66067

See merge request gitlab-org/gitlab-ce!32130

Merge branch 'docs/9102-hide-dismissed-vulnerabilities-in-the-group-security-dashboard' into 'master'

Update security dashboards documentation

See merge request gitlab-org/gitlab-ce!32674

Reflect the addition of a "hide dismissed vulnerabilities" toggle in
security dashboards, see https://gitlab.com/gitlab-org/gitlab-ee/issues/9102

Add .gitlab/ci/frontend.gitlab-ci.yml to frontend review roulette

See merge request gitlab-org/gitlab-ce!32466

Adjust routable metric

See merge request gitlab-org/gitlab-ce!32591

Avoid checking dns rebind protection in validation

Closes #66723

See merge request gitlab-org/gitlab-ce!32577

Those feature flags were always enabled so we can remove them safely.

Change serveo link as it often goes down

See merge request gitlab-org/gitlab-ce!32680

Provide guidance on how docs global navigation should be structured

See merge request gitlab-org/gitlab-ce!32624

Avoid calling freeze on already frozen strings in lib/gitlab

See merge request gitlab-org/gitlab-ce!32637

Merge branch '66966-convert-rails-env-stub-usages-to-use-railshelpers-stub_rails_env-instead' into 'master'

Use stub_rails_env for Rails.env stubbing

Closes #66966

See merge request gitlab-org/gitlab-ce!32625

Add docs exception to lint-ci job

See merge request gitlab-org/gitlab-ce!32683

Add spaces to devops ci template to reduce warnings

See merge request gitlab-org/gitlab-ce!32681

* Define the counter once.
* Make metric name follow Prometheus naming conventions.
* Add label for call method.

Create index for users.unconfirmed_email

See merge request gitlab-org/gitlab-ce!32664

Allow not resolvable urls when dns rebinding setting is disabled

See merge request gitlab-org/gitlab-ce!32523

Now, when the dns rebinging setting is disabled, we will
allow urls that are not resolvable.

Port 3 more debug docs to the docs project

Closes #63035

See merge request gitlab-org/gitlab-ce!31368

Move rails and linux cheat sheets, and test_environment
reference docs to the docs project

Split tests across files for the sake of parallelization

See merge request gitlab-org/gitlab-ce!32686