A catchswitch must be the only non-phi instruction in its basic block;
attempting to move a retain or release into a catchswitch basic block
will result in invalid IR. Explicitly mark a CFG hazard in this case to
prevent the code motion.
Fixes PR37332.
If you want to set CFGHazardAfflicted inside BottomUpPtrState::HandlePotentialUse, perhaps you can read NewRetainRRI's CFGHazardAfflicted bit and set CFGHazardAfflicted here, just as it's done in line 1649?