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

[Michael Klemm via llvm-commits]

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mjklemm wrote:

```suggestion
// See definition in OpenMP (omp.h.var/omp_lib.(F90|h).var)
#define omp_invalid_device -2
```

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