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

[Steffen Larsen via cfe-commits]

steffenlarsen wrote:

Note: I don't personally like that this behaves like a pseudo-Op, but I am also not sure this fits as a CIR Op given it would be the first AMDGPU-specific CIR Op (from what I can find.) Alternatives are welcome.

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