[llvm] [openmp] Reland: [OpenMP] Implement omp_get_uid_from_device() / omp_get_device_from_uid() (PR #168554)

[Robert Imschweiler via llvm-commits]

ro-i wrote:

I removed the Fortran support in this patch, which will be added back in a follow-up patch. The issue is that we need a little infrastructure because we need some adaptor code for converting the C-API results to the correct Fortran API interface signature.

https://github.com/llvm/llvm-project/pull/168554