Merge branch '56731-wait_for_job_to_be_done-gitlab-assets-compile-fails-in-the-review-build-cng-job' into 'master'

Resolve "`wait_for_job_to_be_done "gitlab:assets:compile"` fails in the `review-build-cng` job"

Closes #56731

See merge request gitlab-org/gitlab-ce!24598

Fix closing Markdown codeblock in Epics API docs

See merge request gitlab-org/gitlab-ee!9257

Resolve "Changing wording to "Delete" when referring to removing a branch"

Closes #25569

See merge request gitlab-org/gitlab-ce!23966

Add troubleshooting section to Slack Notification Service

See merge request gitlab-org/gitlab-ce!24339

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

Fix bug that caused Suggestion Markdown toolbar button to insert snippet with leading +/-/<space>

See merge request gitlab-org/gitlab-ce!24568

Add Avatar in the settings sidebar

Closes #56582

See merge request gitlab-org/gitlab-ce!24515

All review jobs should share the same only & except

Closes #56707

See merge request gitlab-org/gitlab-ce!24579

Fix serverless.yml template indentation

See merge request gitlab-org/gitlab-ce!24548

Avoid installing Bundler 2.0 or higher on source-based install

Closes #55979

See merge request gitlab-org/gitlab-ce!24502

Fix Red Master For CE !24554

See merge request gitlab-org/gitlab-ee!9266

Rename entrypoint for clusters update/edit page

Closes #56715

See merge request gitlab-org/gitlab-ce!24583

Upgrade Prettier to v1.16

See merge request gitlab-org/gitlab-ce!24581

Upgrade babel to v7.3

See merge request gitlab-org/gitlab-ce!24573

Add domain field into Clusters::Cluster

See merge request gitlab-org/gitlab-ce!24368

For the stake of standardizing, I've switched the ssl debugging to use
the Rails console rather than a Ruby script file.

Offer more explanation regarding the ssl-test script and how it's used.

[EE Backport] Related merge requests in issue design - Restyle

See merge request gitlab-org/gitlab-ee!9177

This is to match `git branch -D <branchname>`