[clang] [HLSL] Change clang Driver Options to not set CXXOperatorNames (PR #126758)

[Farzon Lotfi via cfe-commits]

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farzonl wrote:

Is it ok to keep the tests as check-label? Tests are still passing with Label? Or should this change to `// CHECK: FunctionDecl {{.*}}  NAME void ()` Which is how it seems other tests are setup.

https://github.com/llvm/llvm-project/pull/126758