Merge branch 'overdue-finalize-background-migration--fix-allow-descendants-override-disabled-shared-runners' into 'master' 

Finalize migration FixAllowDescendantsOverrideDisabledSharedRunners

See merge request https://gitlab.com/gitlab-org/gitlab/-/merge_requests/139180



Merged-by: Diogo Frazão <dfrazao@gitlab.com>
Approved-by: Diogo Frazão <dfrazao@gitlab.com>
Reviewed-by: Mehmet Emin INAC <minac@gitlab.com>
Co-authored-by: Dylan Griffith <dyl.griffith@gmail.com>