Feature - Asking admin when "re-run all submissions" if there are too many submissions using the default queue

Context

When an organizer "re-run all submissions" of some competition having hundreds or thousands submissions, our default queue will be congested.

Proposal

Checking if the submissions number is too big (e.g: > 200) and the competition is using the default queue, then do not allow the organizer to re-run all submission, ask the organizer to request Codalab Admin by email info@codalab.org. Or the organizer can change to other queue with their own compute workers to avoid blocking other competitions.