Updates components to use a slot to allow to reuse the clipboard button
Adds tests

* master: (114 commits)
  Fix Error 500 when viewing a commit with a GPG signature in Geo
  Remember assignee when moving an issue
  Add changelog entry
  Allow oxford commas and spaces before commas in MR issue closing pattern.
  Don't cache a nil repository root ref to prevent caching issues
  Add back database changes for Ci::Build
  Revert "Merge branch 'expired-ci-artifacts' into 'master'"
  Fix order dependencies in some specs
  migrate admin:users:* to static bundle
  correct for missing break statement in dispatcher.js
  alias create and update actions to new and edit
  migrate projects:merge_requests:edit to static bundle
  migrate projects:merge_requests:creations:diffs to static bundle
  migrate projects:merge_requests:creations:new to static bundle
  migrate projects:issues:new and projects:issues:edit to static bundle
  migrate projects:branches:index to static bundle
  migrate projects:branches:new to static bundle
  migrate projects:compare:show to static bundle
  migrate projects:environments:metrics to static bundle
  migrate projects:milestones:* and groups:milestones:* to static bundle
  ...

Backport webpack.config.js changes from EE

See merge request gitlab-org/gitlab-ce!17185

Fix Error 500 when viewing a commit with a GPG signature in Geo

Closes gitlab-ee#4825

See merge request gitlab-org/gitlab-ce!17207

Remember assignee when moving an issue

See merge request gitlab-org/gitlab-ce!17116

Sanitize extra blank spaces used when uploading a SSH key

Closes #40552

See merge request gitlab-org/gitlab-ce!17138

Closes gitlab-org/gitlab-ee#4825

Related to #41949

Update issue closing pattern to be more forgiving

Closes #17500

See merge request gitlab-org/gitlab-ce!17198

Revert "Merge branch 'expired-ci-artifacts' into 'master'"

See merge request gitlab-org/gitlab-ce!17193

Don't cache a nil repository root ref to prevent caching issues

See merge request gitlab-org/gitlab-ce!17179

Fix order dependencies in some specs

Closes #43296

See merge request gitlab-org/gitlab-ce!17189

This reverts merge request !16578

Our automatically-generated project paths are of the form project<N>. If a spec
manually specifies a project path of that form, it may conflict with the
automatically-generated paths in some circumstances.

Remove more route-based chunks from dispatcher.js

See merge request gitlab-org/gitlab-ce!16901

Resolve "Monaco service workers do not work with CDN enabled"

Closes #42641

See merge request gitlab-org/gitlab-ce!17021

Show loading button inline in MR widget

See merge request gitlab-org/gitlab-ce!17174