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

[via cfe-commits]

b-sumner wrote:

@jhuber6 can you comment on "lot of overhead" and if that matters?  Also, not sure why the HSA library dependence is a problem.  This seems to be exposing amdgpu-arch to more maintenance overhead.

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