Merge branch 'ka/fix-pg-backend-pid-log' into 'master'

Ensure PG backend PID is logged

See merge request https://gitlab.com/gitlab-org/gitlab/-/merge_requests/137355



Merged-by: Prabakaran Murugesan <pmurugesan@gitlab.com>
Approved-by: Prabakaran Murugesan <pmurugesan@gitlab.com>
Co-authored-by: Krasimir Angelov <kangelov@gitlab.com>