Object cycle fix ported to branch-22.01#85

Merged

magnatelee merged 2 commits intonv-legate:branch-22.01from

magnatelee:cycle-fix

Nov 2, 2021

Commits on Nov 2, 2021

Remove back edges from partition symbols back to operations to avoid
magnatelee
committed
Make sure we don't create cycles between region fields and attachments
magnatelee
committed