[clang] [CIR][HIP] Skip global init for device variables (PR #231971)

[Steffen Larsen via cfe-commits]

https://github.com/steffenlarsen approved this pull request.

Just a few comments, but otherwise I think it looks reasonable. Looks like it's CUDA related to though, so could you please move the test file and add CUDA to the tags in the title?

https://github.com/llvm/llvm-project/pull/231971