Cleanup stale branches on various projects
Summary
In cleaning up a branch not associated with an MR recently, I noticed that we have quite a few stale branches on gitlab-org/charts/gitlab. I suspect this may also be the case in our other projects.
We should take time to make a concerted cleanup effort. We should delete branches not in use by any MR, and ensure that any review environments from any pipeline spawned by them are also shut down.