Backport CE changes for: Resolves "Reviews: Resolving or unresolving discussions with “Add comment now” does not work"

See merge request gitlab-org/gitlab-ce!22303

Improve spec for Gitlab::Ci::Status::Pipeline::Factory

Closes #52280

See merge request gitlab-org/gitlab-ce!22247

Enable some frozen string in lib/gitlab

See merge request gitlab-org/gitlab-ce!22304

Resolve "Show canary / no-canary in the performance bar"

Closes #52421

See merge request gitlab-org/gitlab-ce!22222

Only display merge commit SHA when it exists

Closes #48889

See merge request gitlab-org/gitlab-ce!22022

Update Android.gitlab-ci.yml for current stable SDK

See merge request gitlab-org/gitlab-ce!22336

Docs: Link to DeclarativePolicy framework from development guide

See merge request gitlab-org/gitlab-ce!22348

Docs: Fixing some bad links

See merge request gitlab-org/gitlab-ce!22287

Fix duplicated key in license management job gitlab-org/gitlab-ce#52609

Closes #52609

See merge request gitlab-org/gitlab-ce!22311

Enable frozen string for the following files:

* lib/gitlab/auth/**/*.rb
* lib/gitlab/badge/**/*.rb
* lib/gitlab/bare_repository_import/**/*.rb
* lib/gitlab/bitbucket_import/**/*.rb
* lib/gitlab/bitbucket_server_import/**/*.rb
* lib/gitlab/cache/**/*.rb
* lib/gitlab/checks/**/*.rb

Partially addresses #47424.

Fix rubocop complaining about unicorn.rb

See merge request gitlab-org/gitlab-ce!22332

Update merge request diff navigation docs

See merge request gitlab-org/gitlab-ce!22275

Drop support for Go 1.9 in GitLab 11.4

Closes #51982

See merge request gitlab-org/gitlab-ce!22324

Updates the check for started in job header

See merge request gitlab-org/gitlab-ce!22329

Add stage name in job.json response

Closes #52618

See merge request gitlab-org/gitlab-ce!22317

The function that was checking if the job was started or not
was expecting a boolean, however it was receiving a null.
During the refactor the condition was changed, causing the function
to break with null

This commit fixes the check

Fix the event API docs

Closes #52512

See merge request gitlab-org/gitlab-ce!22320

Backport CE changes for Ops Dashboard in EE

See merge request gitlab-org/gitlab-ce!22136

Updates gitlab-svg dependency

See merge request gitlab-org/gitlab-ce!22299

Update GitLab Pages to v1.2.1

See merge request gitlab-org/gitlab-ce!22318

If the request came from a canary host, show this in the performance bar
by:

1. Adding a bird emoji.
2. Colouring the hostname yellow.

Hide job sidebar on mobile

Closes #52608

See merge request gitlab-org/gitlab-ce!22314

Resolve "Make file browser hidden by default for mobile screens" and improve layout in small screens too

Closes #52361

See merge request gitlab-org/gitlab-ce!22273

This commit adds back `js-` classes needed to
automatically collapse the sidebar on resize.

Specification change: Fix asciidoctor block context.

See merge request gitlab-org/gitlab-ce!22280

EE branch: 7921-fix-batch-comments-resolution
fixes the checks to know whether discussion will
be resolved upon posting a comment or not. It
covers scenarios where Batch Comments are enabled
and disabled. To minimise risk of conflicts between
CE and EE, the checks have been backported.

this.shouldResolve() will not exist in CE.