Release notes:
- Original 14.3.0 release notes from 2021-09-22: https://about.gitlab.com/releases/2021/09/22/gitlab-14-3-released/
- Patch release from 2021-09-30: https://about.gitlab.com/releases/2021/09/30/security-release-gitlab-14-3-1-released/
This should probably let us resolve T288757.
Update notes for 14.3.0: https://docs.gitlab.com/ee/update/#1430