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

[Michael Klemm via llvm-commits]

https://github.com/mjklemm requested changes to this pull request.

The Fortran part does not match the OpenMP spec. Apologies for having not seen that earlier.

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