[lld] [lld][COFF][LTO] Implement /opt:emitllvm option (PR #66964)

[Matheus Izvekov via llvm-commits]

================
@@ -1822,6 +1822,8 @@ void LinkerDriver::linkerMain(ArrayRef<const char *> argsArr) {
         ltoDebugPM = true;
       } else if (s == "noltodebugpassmanager") {
         ltoDebugPM = false;
+      } else if (s == "emitllvm") {
----------------
mizvekov wrote:

I have implemented emit-asm in https://github.com/llvm/llvm-project/pull/67079 .

https://github.com/llvm/llvm-project/pull/66964