Finalize organization owners backfill
See https://gitlab.com/gitlab-org/gitlab/-/blob/e456f8d51a623ab4a3a4ca093e00b1a9ffedf16b/app/models/user.rb#L377-377 and finalize backfill in !142979 (merged)
See finalization docs: https://docs.gitlab.com/ee/development/database/batched_background_migrations.html#finalize-a-batched-background-migration
Edited by Doug Stull