Merge branch...

Merge branch '480545-resolve-cross-table-interaction-issues-in-lib-gitlab-background_migration' into 'master' 

Resolve cross table interaction issues in lib/gitlab/background_migration/backfill_has_merge_request_of_vulnerability_reads.rb

See merge request https://gitlab.com/gitlab-org/gitlab/-/merge_requests/167794



Merged-by: Michał Zając <mzajac@gitlab.com>
Approved-by: Tetiana Chupryna <tchupryna@gitlab.com>
Approved-by: Michał Zając <mzajac@gitlab.com>
Co-authored-by: Gregory <11164960-ghavenga@users.noreply.gitlab.com>