[ci skip] Merge branch 'master' into 5845-extract-ee-environments-files

* master: (24 commits)
  Remove unneccessary imports
  fixed copy to cliboard button in embedded snippets
  Fix Error 500 viewing admin page due to statement timeouts
  Workhorse to send raw diff and patch for commits
  Refactor out duplication in runner_policy.rb
  Remove unnecessary runner.is_shared? checks in api because they are handled by policy
  Allow admin to assign shared runner to project through API
  Change policy list_runner_jobs -> read_runner
  Rename User#ci_authorized_runners -> ci_owned_runners
  Improve efficiency of authorized_runner policy query
  Use can? policies for lib/api/runners.rb
  Allow group runners to be viewed/edited in API
  Whitelisted query limits for group destroy API
  Fixed typo
  Changed order of include
  Use find_in_batches instead of destroy_all
  Delete remote uploads
  Use correct base width
  Refactor duplicate code
  Add changelog entry for contrib graphs width fix
  ...