Merge branch '409873-cleanup-container-registry-model' into 'master'

Remove migration-related code in Container Repository

See merge request https://gitlab.com/gitlab-org/gitlab/-/merge_requests/148009



Merged-by: David Fernandez <dfernandez@gitlab.com>
Approved-by: Radamanthus Batnag <rbatnag@gitlab.com>
Approved-by: Prabakaran Murugesan <pmurugesan@gitlab.com>
Approved-by: David Fernandez <dfernandez@gitlab.com>
Approved-by: Smriti Garg <sgarg@gitlab.com>
Reviewed-by: David Fernandez <dfernandez@gitlab.com>
Reviewed-by: Sincheol (David) Kim <dkim@gitlab.com>
Reviewed-by: Prabakaran Murugesan <pmurugesan@gitlab.com>
Reviewed-by: Radamanthus Batnag <rbatnag@gitlab.com>
Co-authored-by: Adie Po <avpfestin@gitlab.com>