SyncTransactionWithRetries is used to do one or more CRUD operations in a transaction and then commit the transaction. To support casual consistency, mongod must return the OpTime in CRUD commands.

A FLE2 insert consists of several inserts and one commit. FLE 2 needs to return the OpTime of
of commit transaction command that TransactionWithRetries::run executes to the client, no the operation time of the last commit.

SyncTransactionWithRetries needs to be enhanced to return the OpTime of the commit or provide a way for callers to retrieve so the OpTime can be returned to callers