Merge branch '413543-locking-tables-other-gitlab-schemas' into 'master'

Extending the scope of gitlab_schemas to be locked on multiple dbs

See merge request https://gitlab.com/gitlab-org/gitlab/-/merge_requests/125389



Merged-by: Max Woolf <mwoolf@gitlab.com>
Approved-by: Dylan Griffith <dyl.griffith@gmail.com>
Approved-by: Rutger Wessels <rwessels@gitlab.com>
Approved-by: Max Woolf <mwoolf@gitlab.com>
Reviewed-by: Doug Stull <dstull@gitlab.com>
Reviewed-by: Rutger Wessels <rwessels@gitlab.com>
Co-authored-by: Omar Qunsul <oqunsul@gitlab.com>