Update CE specific specs to match CE version

Closes #6121

See merge request gitlab-org/gitlab-ee!10637

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.

Track issues to epics promotions

Closes #8920

See merge request gitlab-org/gitlab-ee!10537

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

Remove extra line in `spec/models/merge_request_spec.rb`

Closes #6664

See merge request gitlab-org/gitlab-ee!10589

Merge branch '6519-extract-ee-specific-files-lines-for-spec-services-projects-update_service_spec-rb' into 'master'

Extract EE lines for spec/services/projects/update_service_spec.rb

Closes #6519

See merge request gitlab-org/gitlab-ee!10583

Extract EE specific files/lines for spec/views

Closes #6535

See merge request gitlab-org/gitlab-ee!10581

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.

Remove EE-specic parts from issue_card_spec.js

Closes #10503

See merge request gitlab-org/gitlab-ee!10620

Migrate clusters tests to jest

Closes #58981

See merge request gitlab-org/gitlab-ce!27013

Move cluster applications manager tests from karma to jest. Fixes
some migration issues related with timeouts, and HTTP request
expectations.

Add `white-space: nowrap` to all buttons

Closes #60116

See merge request gitlab-org/gitlab-ce!27069

Enable Gitaly FindCommit caching for TreeController

See merge request gitlab-org/gitlab-ce!27100

CE Improve project merge request settings

See merge request gitlab-org/gitlab-ce!26495

Improve project merge request settings

See merge request gitlab-org/gitlab-ee!10366

Update dependency @gitlab/ui to ^3.2.0

See merge request gitlab-org/gitlab-ce!27077

The following specs don't match their versions in CE:
- `spec/services/wiki_pages/create_service_spec.rb`
- `spec/services/wiki_pages/destroy_service_spec.rb`
- `spec/services/wiki_pages/update_service_spec.rb`

There's actually no difference in logic as they work
the same way. But there's difference in how they were
written.

To ensure that there'll be no conflicts, the CE version
of the said specs has been copy-pasted to overwrite the
EE version.

CE Move serverless karma specs to jest

Closes #60154

See merge request gitlab-org/gitlab-ce!27085

Move serverless karma specs to jest

Closes gitlab-ce#60154

See merge request gitlab-org/gitlab-ee!10634

Accessing /namespace/project/tree/master appears to query
FindCommit 5 times with identical parameters. This reduces
the number of FindCommit queries to 1.

Docs: Fix misc anchors

See merge request gitlab-org/gitlab-ce!27088

Docs: Fix two anchors in EE docs

See merge request gitlab-org/gitlab-ee!10635