[clang] [llvm] [CIR][AMDGPU] Route printf in device code through the OpenCL runtime (PR #226435)

[Krzysztof Drewniak via llvm-commits]

krzysz00 wrote:

I'm going to flag the existence of MLIR-upstream's `gpu.printf`, which had OpenCL and HIP lowerings for AMD, in case people want to cross-reference it

https://github.com/llvm/llvm-project/pull/226435