Merge branch 'jh/change_seat_assignment_worker_ff' into 'master'

Ensure no seat workers run after FF disabled

See merge request https://gitlab.com/gitlab-org/gitlab/-/merge_requests/134223



Merged-by: Dylan Griffith <dyl.griffith@gmail.com>
Approved-by: Dylan Griffith <dyl.griffith@gmail.com>
Approved-by: Bishwa Hang Rai <bhrai@gitlab.com>
Reviewed-by: Josianne Hyson <jhyson@gitlab.com>
Reviewed-by: Bishwa Hang Rai <bhrai@gitlab.com>
Co-authored-by: Josianne Hyson <jhyson@gitlab.com>