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

* upstream/master: (120 commits)
  Update CHANGELOG for 8.9.4, 8.8.7, and 8.7.9.
  Remove additional entries from CHANGELOG
  Catch permission denied errors and ignore the disk
  Remove coveralls lines
  Make GH one-off auth the default again for importing GH projects
  Import from Github using Personal Access Tokens.
  Remove hardcoded gitlab-shell version in test env now that the required tag is published
  Updated breakpoint for sidebar pinning
  Expire branch/tag git data when needed.
  Remove unnecessary parens
  Enable Style/UnneededCapitalW Rubocop cop
  Expiry date on pinned nav cookie
  Fix broken spec in git_push_service_spec by stubbing an external issue tracker
  Handle external issues in IssueReferenceFilter
  Move Changelog entry for build retry fix to 8.9.4
  Add Changelog entry for build sidebar retry link fix
  Improve method that tells if build is retryable
  Do not show build retry link when build is active
  Remove coveralls as its unused
  Move changelot item "Add sub nav to file page view" to 8.9.4
  ...

Feedback:
https://gitlab.com/gitlab-org/gitlab-ce/merge_requests/4961#note_12738607

The regression was introduced by:

https://gitlab.com/gitlab-org/gitlab-ce/commit/1b8f52d9206bdf19c0dde04505c4c0b1cf46cfbe

I did that because there's a test specifying that a shared runner cannot
be enabled, in the API. So I assume that is the case for non-admin, but
admins should be able to do so anyway.

Also added a test to make sure this won't regress again.

Closes #19039