Merge branch 'sy-rm-monitor-metrics-10' into 'master'

Remove reference to prometheus metrics from firing alert emails

See merge request https://gitlab.com/gitlab-org/gitlab/-/merge_requests/160496



Merged-by: Zack Cuddy <zcuddy@gitlab.com>
Approved-by: Eva Kadlecová <ekadlecova@gitlab.com>
Approved-by: Aakriti Gupta <agupta@gitlab.com>
Approved-by: James Rushford <jrushford@gitlab.com>
Approved-by: Zack Cuddy <zcuddy@gitlab.com>
Co-authored-by: syasonik <syasonik@gitlab.com>