SERVER-91021 changed internal_transactions_unsharded.js to emulate what mongos does with the TransactionParticipantFailedUnyield error: if the test is running commands directly on a mongod and received TransactionParticipantFailedUnyield, the original error is extracted from it and thrown instead to be handled by the rest of the test.

Unfortunately, this breaks internal_transactions_kill_sessions.js, because TransactionParticipantFailedUnyield will sometimes have Interrupted as original error and the test expects all Interrupted errors to be handled by the runCommand override in retry_on_killed_sessions.js. Since the original error is extracted and thrown after runCommand has finished running, the retry logic in the override does not get to see and handle the error properly.