Merge branch 'mb-wraparound-vacuum-2' into 'master'

Remove pg_stat_activity from vacuum monitoring

See merge request https://gitlab.com/gitlab-org/gitlab/-/merge_requests/119600



Merged-by: Simon Tomlinson <stomlinson@gitlab.com>
Approved-by: Simon Tomlinson <stomlinson@gitlab.com>
Co-authored-by: Marius Bobin <mbobin@gitlab.com>