Reland "[NVPTX] Cleanup/Refactoring in NVPTX AsmPrinter and RegisterInfo (NFC)" (llvm#127277)

Originally landed in llvm#126800

This version fixes a typo in NVPTXAsmPrinter::emitFunctionParamList
where .surfref was erroneously replaced with .samplerref.

Author: AlexMaclean