A Phase 3, Open-Label Study Of Elranatamab Monotherapy Versus Elotuzumab, Pomalidomide, Dexamethasone (Epd) Or Pomalidomide, Bortezomib, Dexamethasone (Pvd) Or Carfilzomib, Dexamethasone (Kd) In Participants With Relapsed/ Refractory Multiple Myeloma Who Received Prior Anti-Cd38 Directed Therapy