[clang] [llvm] [OpenMP][clang] Set num_threads 'strict' to unsupported on GPUs (PR #160659)

[Joseph Huber via llvm-commits]

https://github.com/jhuber6 commented:

Should this be an error or a warning. Considering that it's basically ignored it might be easier to make it a warning so that the code doesn't refuse to compile when someone's swapping something from the CPU to GPU.

https://github.com/llvm/llvm-project/pull/160659