Document IS_GITLAB_EE environment variable

Closes #60131

See merge request gitlab-org/gitlab-ce!27120

Enable ESLint rule jest/no-focused-tests

See merge request gitlab-org/gitlab-ce!27132

Override problematic display with utility class

Closes #60231

See merge request gitlab-org/gitlab-ce!27138

GraphQL complexity limit too low for Schema load / IntrospectionQuery

Closes #60123

See merge request gitlab-org/gitlab-ce!27063

CE: Extract EE specific files/lines for Discussion spec/services

See merge request gitlab-org/gitlab-ce!26950

Edits to documentation dev doc index

See merge request gitlab-org/gitlab-ce!27135

An IntrospectionQuery required more
complexity points.

Fix typo “settings” in Merge requests docs

See merge request gitlab-org/gitlab-ce!27020

Improvements to Documentation style and structure information

See merge request gitlab-org/gitlab-ce!27098

Add test suite with PostgreSQL 10 to be run on a schedule.

Also, move MySQL tests to run only on master branch, and on schedules.

See merge request gitlab-org/gitlab-ce!26920

Also, move MySQL tests to run only on master branch, and on schedules.
Signed-off-by: Balasankar "Balu" C <balasankar@gitlab.com>

Improve performance of PR import

See merge request gitlab-org/gitlab-ce!27121

Extract a Git::HooksService

Closes #15463

See merge request gitlab-org/gitlab-ce!26726

Fix `updated_at` doesn't apply to `state_event` updates of issues via API.

Closes #51279 and #46980

See merge request gitlab-org/gitlab-ce!27124

Externalize strings in flash messages

See merge request gitlab-org/gitlab-ce!27106

- Externalize strings in controllers
- Update PO file

This removes unneeded `.reload` call which
makes AR to load ALL objects, and create its
in-memory representation.

Add useful tips about big repositories

See merge request gitlab-org/gitlab-ce!27005

Adds EE folder in the stylelint command

See merge request gitlab-org/gitlab-ce!27058

Display maximum artifact size from runtime config

See merge request gitlab-org/gitlab-ce!26784

Docs: Fix anchors related to variables doc

See merge request gitlab-org/gitlab-ce!27081

Add doc when rspec-set won't work

See merge request gitlab-org/gitlab-ce!27050

Update dependency @gitlab/svgs to ^1.59.0

See merge request gitlab-org/gitlab-ce!27104

Update RegExp syntax link to RE2

See merge request gitlab-org/gitlab-ce!27090

CI ref pattern matching now uses RE2 instead of Ruby.
See
https://about.gitlab.com/2019/04/01/security-release-gitlab-11-dot-9-dot-4-released/ for more information.

Resolve "Weight trainee maintainers higher in reviewer roulette"

Closes #60035

See merge request gitlab-org/gitlab-ce!27043

Extract create merge request quick action spec

Closes #59570

See merge request gitlab-org/gitlab-ce!26914

Extract w-i-p quick action to a shared example

Closes #59570

See merge request gitlab-org/gitlab-ce!26923

Extract duplicate quick action spec to a shared example

Closes #59570

See merge request gitlab-org/gitlab-ce!26912

Add touch events for diff viewers

Closes #60006

See merge request gitlab-org/gitlab-ce!26971

Safari on iOS sort of figures out the right thing here, but other
browsers need a specific touch to be referenced.

This makes it work on Chrome and Firefox on Android, as well as
Chrome DevTools mobile device view.