Add latest changes from gitlab-org/gitlab@master

app/views/projects/_files.html.haml

app/views/projects/services/_index.html.haml

app/views/shared/_field.html.haml

app/views/shared/_service_settings.html.haml

app/workers/all_queues.yml

app/workers/clusters/cleanup/app_worker.rb

app/workers/clusters/cleanup/project_namespace_worker.rb

app/workers/clusters/cleanup/service_account_worker.rb

changelogs/unreleased/34850-fix-graphql-todo-ids.yml

changelogs/unreleased/8199-epic-quick-actions-preview.yml

changelogs/unreleased/do-not-abort-merge-trains-on-ff.yml

...logs/unreleased/feature-cluster-cleanup-state-machine.yml

config/sidekiq_queues.yml

db/migrate/20190918104731_add_cleanup_status_to_cluster.rb

...te/20190918121135_add_cleanup_status_reason_to_cluster.rb

..._add_merge_requests_index_on_target_project_and_branch.rb

db/schema.rb

doc/development/api_graphql_styleguide.md

doc/development/testing_guide/end_to_end/feature_flags.md

doc/development/testing_guide/end_to_end/index.md