[NVPTX] Adapt tests to make them usable with CUDA-12.x

CUDA-12 no longer supports 32-bit compilation.

Tests agnostic to 32/64 compilation mode are switched to use nvptx64.
Tests that do care about it have 32-bit ptxas compilation disabled with cuda-12+.

Differential Revision: https://reviews.llvm.org/D152199