[clang] [llvm] [DirectX][DXIL] Set DXIL Version in DXIL target triple based on shader model version (PR #90809)

[Justin Bogner via cfe-commits]

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@@ -630,7 +630,7 @@ extern "C" int optMain(
     }
   }
 
-  Triple ModuleTriple(M->getTargetTriple());
+  Triple ModuleTriple(Triple::normalize(M->getTargetTriple()));
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bogner wrote:

Similarly to my concern about updating `createTargetMachineForTriple`, I don't think opt should messing with the triple it's given.

https://github.com/llvm/llvm-project/pull/90809