There is nothing stopping a crew briefing that in the event the tail wind for RWY 18 ILS is too much then we will maintain 1000' or even 1500' and break off to join downwind for the other runway. Not technically conducting a go around only now a circling approach off the ILS.
Quite legal, safe and practical.
It takes a little thought ( FCU modes etc ), pre planning and appropriate briefing so all the crew are in the loop.
If you need ATC clearance then obviously pre warning/asking them would greatly help.
At the end if the day if you're not sure, or you get caught out then keep it simple and fly the published, engage AP and take a breath before making your next move.