[llvm-branch-commits] [clang] [llvm] [HLSL][RootSignature] Update `setDefaultFlags` to account for Root Signature Version (PR #145828)

[Justin Bogner via llvm-branch-commits]

https://github.com/bogner approved this pull request.

Some minor comments but this looks good once they're accounted for.

https://github.com/llvm/llvm-project/pull/145828