Automate post-release GitLab updates with gitlab-triage
Closes #17589 (closed)
GitLab Triage doc: https://gitlab.com/gitlab-org/gitlab-triage
This is a first iteration, meant to solve a couple of the immediate problems we're facing.
Future work might include running gitlab-triage via a CI pipeline, which the RM could trigger manually at the appropriate time in the release process. This would avoid the burden of maintaining a Docker setup locally.