Triage known heavy usages of Redis with the appropriate stage group
This project was pulled out of the Redis Advocacy epic because it seemed like a project in it's own right.
Also included are the following from gitlab-org/gitlab
* [ ] https://gitlab.com/gitlab-org/gitlab/-/issues/219071 : session:lookup:ip:gitlab redis set is not cleared on persistent use
* [ ] https://gitlab.com/gitlab-org/gitlab/-/issues/225600 : MR discussion diffs persists and reads too much data from Redis
Many of these issues are for investigation so that we are able to pass some useful information over to the stage groups.
epic