Bgsync stops all index builds even before transitioning to rollback state and causes secondary replication to hang
Make Abort index build logic deterministic.
Make initial sync work with two phase index builds + commit quorum on
Implement commit quorum option "all"
Enable commit quorum for concurrency suites.
Investigate changes in SERVER-46823: Enable default for index commit quorum as "votingMembers"
Rename commit quorum option "all" to "votingMembers".