[llvm] [llvm][offload] Move AMDGPU offload utilities to LLVM (PR #102487)

[Fabian Mora via llvm-commits]

fabianmcg wrote:

> Which other projects will use it? and How?

Upstream: MLIR, see this patch: https://github.com/llvm/llvm-project/pull/95292 In there we use it to get SGPR*, VGPR*, etc metadata.

Downstream: [rocMLIR ](https://github.com/ROCm/rocMLIR) for the same reason.

https://github.com/llvm/llvm-project/pull/102487