[clang] [HLSL] Add -HV option translation to clang-dxc.exe (PR #83938)

[Chris B via cfe-commits]

https://github.com/llvm-beanz commented:

I worry this pattern will also lend to us having multiple places that parse and translate HLSL versions. Can you look at other places in Clang where we handle these numbers and see if there is a good way to unify the string handling? It would be ideal for us to only have one place we need to modify when we add new language versions.

https://github.com/llvm/llvm-project/pull/83938