[clang] Let clang-cl support CUDA/HIP (PR #68921)

[Yaxun Liu via cfe-commits]

yxsamliu wrote:

The main objective is to make porting cmake files easier. Without it, you have to use clang-cl.exe to compile C++ and clang.exe to compile HIP since the options are not compatible. Now you can use clang-cl.exe to compile both, which accepts both MSVC options and clang options.

https://github.com/llvm/llvm-project/pull/68921