Adds tests and verifies environment has rollout_status key

Remove fake API response

* master:
  Update CHANGELOG.md for 8.16.6
  Update CHANGELOG-EE.md for 8.16.6-ee
  Update CHANGELOG.md for 8.14.10
  Update CHANGELOG-EE.md for 8.14.10-ee
  Update CHANGELOG.md for 8.15.7
  Update CHANGELOG-EE.md for 8.15.7-ee

Adds CSS

[ci skip]

[ci skip]

Add patch changelogs

See merge request !1259

* master: (212 commits)
  Truncate the DB in after(:all) test for Gitlab::ImportExport::ProjectTreeRestorer
  Fix  depenendencies loading Vue in EE
  Resolve conflicts
  writes test suite
  Support v4 API for GitLab Geo endpoints
  update yarn resolution for jquery-ui
  Remove support for locking in pipeline retry service
  Update gitlab_flow.md
  changed minor inconsistency in help text
  Update lock file
  use http to feth jquery-ui dependency instead of ssh
  Change development tanuki favicon colors to match logo color order
  Allow slashes in slash command arguments
  Geo: Don't create the project when it's being imported
  A few more specs
  Replicate repository creation in Geo secondary node
  Add API endpoint to get all milestone merge requests
  Added back weight icon on issue rows
  Backport API to v3
  remove trailing comma
  ...

CE Upstream - Friday

Closes #1361, #1652, gitlab-ce#20305, and gitlab-ce#24036

See merge request !1257

Toggle deploy board

adds global minimum mirror sync time option in admin section

See merge request !1217

Replicate repository creation in Geo secondary node

Closes #1071

See merge request !952

Signed-off-by: Rémy Coutable <remy@rymai.me>

Support v4 API for GitLab Geo endpoints

See merge request !1256

Signed-off-by: Rémy Coutable <remy@rymai.me>

Signed-off-by: Rémy Coutable <remy@rymai.me>

Use http to fetch jQuery-ui dependency instead of ssh

Closes #28339

See merge request !9331

Added back weight icon on issue rows

Closes #1739

See merge request !1250

changed minor inconsistency in help text

See merge request !9333

Update gitlab_flow.md. Insert missing word on line 70.

See merge request !9334

Replace static fixture for project_title_spec.js

See merge request !9175

Document better the CE -> EE merge

See merge request !9313

Make pipeline retry take stages order into account

Closes #27431, #23710, and #26551

See merge request !9021

move task_list setup and events to own class

See merge request !9016

Increase right side of file header to accommodate browse files button

Closes #28236

See merge request !9321

Dispatch needed JS when creating a new MR in diff view

Closes #27920

See merge request !9238

Change development tanuki favicon colors to match logo color order

Closes #28303

See merge request !9329