[llvm] [AMDGPU][OpenMP] Using HSA API calls for APU detection. (PR #90186)

[Joseph Huber via llvm-commits]

https://github.com/jhuber6 commented:

So it seems that HSA bumped up to 6.1 and introduced new runtime functions but neglected to bump up any sort of version indicator that would let us detect if they are available. So now, even though these are HSA functions, we're including a completely unrelated library just to check if they exist. This is a really annoying situation and I wish HSA would actually version things.

https://github.com/llvm/llvm-project/pull/90186