Extract EE specific files/lines for Discussion spec/requests/api

Closes #6670

See merge request gitlab-org/gitlab-ee!10603

Regenerate locale/gitlab.pot file

See merge request gitlab-org/gitlab-ee!11896

Fix base domain help text update

Closes #61036

See merge request gitlab-org/gitlab-ce!27746

Internationalisation of javascript/m* directories

See merge request gitlab-org/gitlab-ce!27723

This is one of many MRs opened in order to improve the overall
internationalisation of the GitLab codebase.

i18n documentation
https://docs.gitlab.com/ee/development/i18n/externalization.html

Internationalisation of vue_shared directory

See merge request gitlab-org/gitlab-ce!27751

This is one of many MRs opened in order to improve the overall
internationalisation of the GitLab codebase.

This commit only targets the Vanilla JS files.

i18n documentation
https://docs.gitlab.com/ee/development/i18n/externalization.html

Update dependency @gitlab/ui to ^3.7.0

See merge request gitlab-org/gitlab-ce!27832

Resolve "Project is being serialized when enqueueing to sidekiq"

Closes #59265

See merge request gitlab-org/gitlab-ce!27825

Prevent concurrent execution of PipelineScheduleWorker

Closes gitlab-com/gl-infra/production#805

See merge request gitlab-org/gitlab-ce!27781

Change comments to point to the new path of sidekiq-cluster

See merge request gitlab-org/gitlab-ce!27707

Move sidekiq-cluster to ee/bin

Closes #6565

See merge request gitlab-org/gitlab-ee!11001

Upgrade letter_opener_web to support Rails 5.1

See merge request gitlab-org/gitlab-ce!27829

Before this commit using `/rails/letter_opener` in `development`
environment failed with:

    undefined method `before_filter'

See https://github.com/fgrehm/letter_opener_web/issues/68

This commit upgrades `letter_opener_web` to 1.3.4 so Rails 5.1 is
supported.

Resolve "Extract EE specific files/lines for spec/javascripts/vue_mr_widget/mock_data.js"

Closes #6553

See merge request gitlab-org/gitlab-ee!11847

- Regular mock_data is the same in CE and EE now
- new EE-specific mock_data extends the CE one
- Updated dependent specs in EE

Add full backtrace for RSpec output

See merge request gitlab-org/gitlab-ce!27686

Upgrade Gitaly to v1.36.0

See merge request gitlab-org/gitlab-ce!27831

Make `CI_COMMIT_REF_NAME` and `SLUG` variable idempotent

Closes #60822

See merge request gitlab-org/gitlab-ce!27663

Move test method to the bottom

See merge request gitlab-org/gitlab-ce!27816

Internationalisation of cycle_analytics directory

See merge request gitlab-org/gitlab-ce!27674

This is one of many MRs opened in order to improve the overall
internationalisation of the GitLab codebase.

i18n documentation
https://docs.gitlab.com/ee/development/i18n/externalization.html

Merge branch '10949-fix-the-following-style-lint-errors-and-warnings-for-ee-app-assets-stylesheets-pages-milestone-scss' into 'master'

Resolve "Fix the following style-lint errors and warnings for `ee/app/assets/stylesheets/pages/milestone.scss`"

Closes #10949

See merge request gitlab-org/gitlab-ee!11665

Port of 55948-help-text-formatting-wiki to EE

See merge request gitlab-org/gitlab-ee!11494

Format extra help page text like wiki

Closes #55948

See merge request gitlab-org/gitlab-ce!26782

CE Backport: Prefer usage of helper `expanded_by_default?`

See merge request gitlab-org/gitlab-ce!27729

Stop using `Rails.env.test?` in views.