Refactor Issues doc

See merge request gitlab-org/gitlab-ee!10564

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

Enable ESLint rule jest/no-focused-tests (EE-port)

See merge request gitlab-org/gitlab-ee!10648

(cherry picked from commit 872ec6b7ac02a2a0d571336f0451cc1482cbd934)

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

Extract EE specific files/lines for Discussion spec/services

Closes #6628

See merge request gitlab-org/gitlab-ee!10577

Remove slack slash commands `run` double up

Closes #10856

See merge request gitlab-org/gitlab-ee!10555

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

EE: Extract a Git::HooksService

See merge request gitlab-org/gitlab-ee!10489

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

Extract EE specific files/lines for spec/controllers/groups

Closes #6536

See merge request gitlab-org/gitlab-ee!10524

This is part of moving gitlab into single codebase.

Externalize strings in flash messages

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