[clang] [clang][AMDGPU][CUDA] Handle __builtin_printf for device printf (PR #68515)

[Matt Arsenault via cfe-commits]

arsenm wrote:

> > It looks reasonable to me, although I'm not really an AMDGPU person. /me summons @arsenm ?
> 
> AMDGPU backend relies on LLVM passes to translate printf at IR level.

For the OpenCL case only, not for HIP/OpenMP

https://github.com/llvm/llvm-project/pull/68515