Disable delete_range_deletion_tasks_on_stepup_after_drop_collection.js on stepdown suites

This test uses fail points to artificially block refreshes. In case of CSRS stepdown, a migration can get aborted calling for a cleanup that can fail half-way since the shard primary can also step down . This can result in a deadlock on migration resume because the test could fail before re-enabling refreshes.

Check BF-20591 for the full explanation.