Cancel redundant pipelines in merge train when reconstruction happens

Closes #12996

See merge request gitlab-org/gitlab-ee!15450

Bump reliable fetcher

See merge request gitlab-org/gitlab-ce!32565

Stub DetectRepositoryLanguagesWorker for all tests

See merge request gitlab-org/gitlab-ce!32430

It performs an expensive operation, but isn't required in
most of tests

Stub DetectRepositoryLanguagesWorker for all tests

See merge request gitlab-org/gitlab-ee!16024

Remove deprecation message for milestone tabs

See merge request gitlab-org/gitlab-ce!32252

Use Security Dashboard in pipelines view

See merge request gitlab-org/gitlab-ee!15682

This [replaces][1] the Split Security Reports app with the Security
Dashboard in the pipelines view. This is part of a larger effort to
[move security reports logic to the backend][2].

This is behind the `pipeline_report_api` feature flag, which is
currently disabled by default.

A few other related changes were made:

- Old references to "timeline" were replaced with "history" in specs
- DRY in some specs regarding state initialisation
- Make the history and count endpoint props optional on the dashboard
  component, which, if missing/empty, disable the display of the counts
  and charts components
- Fixes a rendering discrepancy in the vulnerability modal, which was
  displaying a `File: undefined` row

[1]: https://gitlab.com/gitlab-org/gitlab-ee/issues/13496
[2]: https://gitlab.com/groups/gitlab-org/-/epics/1425

Remove all references to Gitlab::CorrelationId

See merge request gitlab-org/gitlab-ce!32228

Geo - Remove unnecessary specs when PostgreSQL FDW is not enabled

See merge request gitlab-org/gitlab-ee!16026

If user can push to docker then it can delete too

Closes #40096

See merge request gitlab-org/gitlab-ce!31796

Extends the permission of $CI_REGISTRY_USER to allow them
to delete tags in addition to just pushing.

https://gitlab.com/gitlab-org/gitlab-ce/issues/40096

We're reversing the deprecation due to user feedback

Make badging less confusing in quick actions doc

Closes #66886

See merge request gitlab-org/gitlab-ce!32515

Add suggested changes to docker build doc

Closes #66802

See merge request gitlab-org/gitlab-ce!32442

Add Danger bot development documentation

Closes #58192

See merge request gitlab-org/gitlab-ce!32506

This is overdue, and some of the suggestions are embarrassing, but
this is how we actually develop Danger today.

Remove area chart in favor of time series

Closes #66393

See merge request gitlab-org/gitlab-ce!32129

Expand textarea for CA cert in cluster form

See merge request gitlab-org/gitlab-ce!32508

Alphabetize the feature lists in license.rb

See merge request gitlab-org/gitlab-ee!15623

Since GitLab 12.0 foreign data wrapper (FDW) is a hard
requirement.

Add X-GitLab-NotificationReason header to note emails

See merge request gitlab-org/gitlab-ce!32422

Add X-GitLab-NotificationReason header to note emails

See merge request gitlab-org/gitlab-ee!15845

Backport EE changes for built-in project template test

See merge request gitlab-org/gitlab-ce!32358

Add built-in project template test

See merge request gitlab-org/gitlab-ee!15766