Merge branch '65312-use-group-labels-instead-of-legacy-team-labels-for-danger-picking-test-reviewers' into 'master'

Detect the new stage labels in `Gitlab::Danger::Teammate`

Closes #65312

See merge request gitlab-org/gitlab-ce!32261

Merge branch '66641-broken-master-real-http-connections-are-disabled-unregistered-request' into 'master'

Use `stub_full_request` to fix spec failure

Closes #66641

See merge request gitlab-org/gitlab-ce!32259

Merge branch '66641-broken-master-real-http-connections-are-disabled-unregistered-request-ee' into 'master'

[EE] Use `stub_full_request` to fix spec failure

See merge request gitlab-org/gitlab-ee!15677

Removes trailing whitespace to fix linting

See merge request gitlab-org/gitlab-ce!32265

Also change test URL sequest to .test TLD

Also change test URL sequest to .test TLD

Add nil check for Gitlab.config.prometheus

Closes #13806

See merge request gitlab-org/gitlab-ce!32201

Add nil check for Gitlab.config.prometheus

Closes #13806

See merge request gitlab-org/gitlab-ee!15629

Update the syntax of DAG example

See merge request gitlab-org/gitlab-ce!32137

Update DB migrations style guide: prefer atomic migrations when possible

See merge request gitlab-org/gitlab-ce!31915

Currently, the DB migrations guide says that "you must" use non-blocking
operations (such as CREATE INDEX CONCURRENTLY), always.

But this does not make sense in cases of empty tables and leads to
splitting the work to multiple non-atomic
(with disable_ddl_transaction!) DB migrations.

To follow KISS principle, to have fewer DB migrations steps,
to have them atomic when it's possible and simplify deployment
and troubleshooting, the following exceptions were added
to the doc:

- index creation,
- index dropping,
- defining an FK,
- adding a column with DEFAULT,

Signed-off-by: Rémy Coutable <remy@rymai.me>

Use structured logging for DB load balancer

See merge request gitlab-org/gitlab-ee!15442

As part of an effort to increase the observability of our database load
balancing, we are moving towards structured logging.

Run markdownlint before Nanoc checks

See merge request gitlab-org/gitlab-ce!32256

Make it simpler to run markdownlint by moving it before
we do those hacks to run Nanoc.

Promote Label to Group Label via API endpoint

Closes #57657

See merge request gitlab-org/gitlab-ce!25218

Update index of feature flags

See merge request gitlab-org/gitlab-ce!32217

Made it clear the pages are about feature flags,
and not documentation.

Update capitalization in /dev docs

See merge request gitlab-org/gitlab-ce!32189

Clean up capitalization in /development /gitlab-basics and
/install

Update capitalization in /integrations and /raketasks

See merge request gitlab-org/gitlab-ce!32241

Also updates redirect text in /project-services

Remove unused add_member/delete_member

Closes #9076

See merge request gitlab-org/gitlab-ee!15013

Remove N+1 SQL query loading project feature in dashboard

Closes #66482

See merge request gitlab-org/gitlab-ce!32169

[#2838] add cache override explanation

See merge request gitlab-org/gitlab-ce!32024