[clang] [amdgpu-arch] Replace use of HSA with reading sysfs directly (PR #116651)

[Yaxun Liu via cfe-commits]

yxsamliu wrote:

I think we could use this approach for Linux. amdgpu-arch can still use HIP runtime to detect GPU for both Linux and Windows, so we still have a fallback even if we remove the HSA approach.

https://github.com/llvm/llvm-project/pull/116651