[llvm] [SPIRV] Migrate NSDI emission from a machine pass to DebugHandlerBase (PR #191212)

[Dmitry Sidorov via llvm-commits]

================
@@ -678,6 +678,12 @@ void SPIRVModuleAnalysis::processOtherInstrs(const Module &M) {
                    MI.getOperand(2).getImm() ==
                        SPIRV::InstructionSet::
                            NonSemantic_Shader_DebugInfo_100) {
+          // TODO: This branch is dead. SPIRVNonSemanticDebugHandler emits NSDI
+          // instructions directly as MCInsts at print time; no
+          // MachineInstructions with the NonSemantic_Shader_DebugInfo_100 ext
----------------
MrSidims wrote:

nit: lets not call out the instruction set name (aka v .100) explicitly here 

fine to keep it in other places where specification is mentioned

https://github.com/llvm/llvm-project/pull/191212