[clang] [HLSL] Desugar type when converting from a ConstantArrayType to an ArrayParameterType (PR #126561)

[Damyan Pepper via cfe-commits]

https://github.com/damyanp commented:

LGTM from a code perspective. If you're confident that it's the right thing to do then yay!

https://github.com/llvm/llvm-project/pull/126561