[NVPTX] Cleanup/Refactoring in NVPTX AsmPrinter and RegisterInfo (NFC)#126800

AlexMaclean merged 2 commits intollvm:mainllvm/llvm-project:mainfrom

AlexMaclean:dev/amaclean/upstream/misc-asmprinter-cleanupAlexMaclean/llvm-project:dev/amaclean/upstream/misc-asmprinter-cleanupCopy head branch name to clipboard