Merge branch '419366-upsert-organization-users' into 'master'

Update organization_users on member creation

See merge request https://gitlab.com/gitlab-org/gitlab/-/merge_requests/139188



Merged-by: Aboobacker MK <akarakath@gitlab.com>
Approved-by: mo khan <mo@mokhan.ca>
Approved-by: Aboobacker MK <akarakath@gitlab.com>
Approved-by: Matt Kasa <mkasa@gitlab.com>
Reviewed-by: Doug Stull <dstull@gitlab.com>
Reviewed-by: Abdul Wadood <awadood@gitlab.com>
Co-authored-by: Doug Stull <dstull@gitlab.com>