Due to SERVER-33223, a global WriteUnitOfWork gets established in unstashTransactionResources() if snapshot read concern is specified. This WUOW will commit after running runCommandImpl(). However, waitForWaitConcern happens inside runCommandImpl() and will hit the invariant inside a WUOW.

We need to wait for write concern after committing the WUOW for commitTransaction and abortTransaction commands and disable or ignore write concerns for writes in a transaction.