CE backport for gitlab-org/gitlab-ee!14664: Show indicator to Pipelines for merge train

See merge request gitlab-org/gitlab-ce!32025

Update feature flag name for Cycle Analytics

See merge request gitlab-org/gitlab-ce!32641

https://gitlab.com/gitlab-org/gitlab-ee/issues/14671

Resolve "Snippet title whitespace"

Closes #67248

See merge request gitlab-org/gitlab-ce!32877

Add source and merge_request fields to pipeline event webhook

Closes #63338

See merge request gitlab-org/gitlab-ce!32373

Update documentation for GitHub integration

See merge request gitlab-org/gitlab-ce!32385

Update docs to reflect the new default behavior
for status check names

Use `ChronicDuration` in a thread-safe way

See merge request gitlab-org/gitlab-ce!32817

Replace 'chronic_duration' to 'gitlab_chronic_duration', to make
relevant method calls thread-safe.

Fix review pipeline needs blocking scheduled deploys

Closes #26893 and gitlab-ee#26893

See merge request gitlab-org/gitlab-ce!32925

Add missing `render_gfm` import to files

See merge request gitlab-org/gitlab-ce!32830

Replacing vue-resource with axios in Markdown field

Closes #61385

See merge request gitlab-org/gitlab-ce!32742

Add webpack memory test to CI

Closes #65698

See merge request gitlab-org/gitlab-ce!31537

Add rake task `db:obsolete_ignored_columns`

See merge request gitlab-org/gitlab-ce!32904

Show a list of obsolete `ignored_columns`

Back port changes for country list Api

See merge request gitlab-org/gitlab-ce!32688

Backport changes for 16252 in EE add current_user to report comparison services

See merge request gitlab-org/gitlab-ce!32920

Add missing Vue.use(Vuex) in test

See merge request gitlab-org/gitlab-ce!32837

Disable "transfer group" button when no parent group is selected

Closes #64799

See merge request gitlab-org/gitlab-ce!31387

Refactor project_edit.js to be reusable for this purpose

Closes #64799

Update Prometheus set up steps

See merge request gitlab-org/gitlab-ce!32898

Add support for custom domains to the Pages internal API

See merge request gitlab-org/gitlab-ce!32735

Add 30 and 60 minute buckets

Closes #67218

See merge request gitlab-org/gitlab-ce!32833

Port CE: Migrate discussion_ids on promoted epics

See merge request gitlab-org/gitlab-ce!30810

Notes on epics promoted from an issue used to get same discussion_id
as the notes from the issue the epic was promoted from, which would
cause problems when trying to reply to the epic discussion.

Update docs for added licenses in dependency list

See merge request gitlab-org/gitlab-ce!32389

Merge code quality docs together

See merge request gitlab-org/gitlab-ce!32737

Bring the example config and the main doc together to simplify
documentation for code quality

Change several links to relative

See merge request gitlab-org/gitlab-ce!32919

Make several links, mostly in admin troubleshooting,
relative, as is the standard