API: Promote project milestone to a group milestone

Closes #53861

See merge request gitlab-org/gitlab-ce!25203

Added: Specs for the API action

Remove N+1 query for tags in /admin/runners page

See merge request gitlab-org/gitlab-ce!25572

As discussed in https://github.com/mbleigh/acts-as-taggable-on/issues/91,
we can avoid N+1 queries if we use `tags` instead of `tag_list`.

Seen while reviewing
https://gitlab.com/gitlab-org/gitlab-ce/merge_requests/19740.

Format feedback issue content for CS vulns

Closes #9897

See merge request gitlab-org/gitlab-ee!9655

Align with the content displayed in the UI
Support upcoming CS vulnerability objects coming from the group
dashboard.

update persona links issue template

See merge request gitlab-org/gitlab-ee!9715

update persona links issue template

See merge request gitlab-org/gitlab-ce!25560

Add name_without_type to environments.json

See merge request gitlab-org/gitlab-ce!25492

It's needed to show shorter names in environments "folders"

Revert "Merge branch '56726-fix-n+1-in-issues-and-merge-requests-api' into 'master'"

See merge request gitlab-org/gitlab-ce!25570

Fix ETag caching not being used for AJAX requests

Closes #57905

See merge request gitlab-org/gitlab-ce!25400

Update documentation for License Management

See merge request gitlab-org/gitlab-ee!9722

This reverts merge request !25042

Revert "Merge branch '13784-simple-masking-of-protected-variables-in-logs' into 'master'"

See merge request gitlab-org/gitlab-ce!25566

This reverts merge request !25293

Fix N+1 query in Issues and MergeRequest API when issuable_metadata presense

See merge request gitlab-org/gitlab-ce!25042

Move logic of obtaining Issuable data to separate method

Merge branch '46750-ci-empty-environment-is-created-even-when-a-job-isn-t-run-when-manual' into 'master'

Sort Environments by Last Updated

Closes #46750

See merge request gitlab-org/gitlab-ce!25260

Merge branch 'ee-46750-ci-empty-environment-is-created-even-when-a-job-isn-t-run-when-manual' into 'master'

Port "Sort Environments by Last Updated"

See merge request gitlab-org/gitlab-ee!9581

Get rid of ScheduleInstallationService

See merge request gitlab-org/gitlab-ce!25420

- deletes schedule_installation_service.rb
- moves schedule_installation_service.rb logic to create_service.rb
- moves specs as well

Removes code duplication

Remove unecessary spec block

Abide review suggestions

Test installable applications which are not associated to a cluster

Fix a typo

Removes duplciated expectation

Reuse variable instead of redefining

Remove method in favor of a local scoped lambda

Improve 'failing service' shared examples

Test the increase of status count

Remove duplicated test

Enable fronzen literal

Resolve "Extend utility classes for `gitlab-ui`search-box"

Closes #58202

See merge request gitlab-org/gitlab-ce!25554

Revert "Merge branch 'revert-82d7b5a0-ce' into 'master'"

Closes #57857 and #50747

See merge request gitlab-org/gitlab-ce!25559

Revert "Merge branch 'revert-82d7b5a0' into 'master'"

See merge request gitlab-org/gitlab-ee!9704