Merge branch '428115-fix-race-condition-when-creating-repo' into 'master'

Upsert container repositories when finding or creating them

See merge request https://gitlab.com/gitlab-org/gitlab/-/merge_requests/138616



Merged-by: charlie ablett <cablett@gitlab.com>
Approved-by: Radamanthus Batnag <rbatnag@gitlab.com>
Approved-by: Gregory Havenga - On PTO until 2 Jan 2024 <11164960-ghavenga@users.noreply.gitlab.com>
Approved-by: charlie ablett <cablett@gitlab.com>
Approved-by: Dzmitry Meshcharakou <12459192-dmeshcharakou@users.noreply.gitlab.com>
Approved-by: Drew Blessing <drew@gitlab.com>
Approved-by: Andrew Evans <aevans@gitlab.com>
Reviewed-by: charlie ablett <cablett@gitlab.com>
Reviewed-by: Dzmitry Meshcharakou <12459192-dmeshcharakou@users.noreply.gitlab.com>
Reviewed-by: Radamanthus Batnag <rbatnag@gitlab.com>
Co-authored-by: Adie Po <avpfestin@gitlab.com>