Merge branch '26732-combine-deploy-keys-and-push-rules-and-mirror-repository-and-protect-branches-settings-pages-ee' into 'master'

Port of 26732-combine-deploy-keys-and-push-rules-and-mirror-repository-and-prote…

See merge request !1167

[EE] Prometheus monitoring

See merge request !1374

Remove unnecessary Vue usage

See merge request !1363

Also fixed naming of a test in the deploy_keys_presenter

Used collection on the deploy_keys/_index.html partial render calls,
also added delegate methods on the deploy_keys_presenter.rb

Fixed the repository_controller_spec.rb

Added specs for the deploy_keys_presenter and added a new method in the presenter
called #key_available?

Fixed some minor UX inconsistencies and added a concern to handle
redirection

Also removed redundant code

Fixed the repository_helper not using instance variables, also
added the repository shorcut handler inside the dispatcher

Also fixed the access_level_dropdown not pointing in the right direction

Port of 26732-combine-deploy-keys-and-push-rules-and-mirror-repository-and-protect-branches-settings-pages to EE

Resolve "Elasticsearch project indexing fails on bad data"

Closes #1840

See merge request !1365

CE upstream

See merge request !1360

Signed-off-by: Dmitriy Zaporozhets <dmitriy.zaporozhets@gmail.com>

# Conflicts:
#   app/helpers/preferences_helper.rb

Port of remove-readme-option to EE

See merge request !1368

Signed-off-by: Dmitriy Zaporozhets <dmitriy.zaporozhets@gmail.com>

Signed-off-by: Dmitriy Zaporozhets <dmitriy.zaporozhets@gmail.com>

# Conflicts:
#   app/policies/group_policy.rb

Native Unicode Emojis - EE merge edition

See merge request !1369

Backport "Simplify project payload exposed on Environment endpoints in V4"

See merge request !1345

Fix LDAP DN case-mismatch bug in LDAP group sync

Closes #1338

See merge request !1337

Fixing some preexisting issues (Safari) and some new issues (Windows
Firefox)

Maintain emoji line-height in it's context to avoid cut-off,
(Windows 10) http://i.imgur.com/xmdOLgv.png

This also allows us to get rid of the small bodge for the cut-off in
Safari

It was pulling
https://developer.mozilla.org/en-US/docs/Web/JavaScript/Reference/Global_Objects/Object/watch

 - gl_emoji for falling back to image/css-sprite when the browser
   doesn't support an emoji
 - Markdown rendering (Banzai filter)
 - Autocomplete
 - Award emoji menu
    - Perceived perf
    - Immediate response because we now build client-side
 - Update `digests.json` generation in gemojione rake task to be more
   useful and  include `unicodeVersion`

MR: !9437

See issues

 - #26371
 - #27250
 - #22474

Only group owners can set ldap overrides

See merge request !1025