Add cop to avoid find in Sidekiq workers

See merge request https://gitlab.com/gitlab-org/gitlab/-/merge_requests/159112



Merged-by: Peter Leitzen <pleitzen@gitlab.com>
Approved-by: Serena Fang <sfang@gitlab.com>
Approved-by: Peter Leitzen <pleitzen@gitlab.com>
Reviewed-by: Peter Leitzen <pleitzen@gitlab.com>
Reviewed-by: Terri Chu <tchu@gitlab.com>
Co-authored-by: Terri Chu <tchu@gitlab.com>