[llvm] [OpenMP] Adjust 'printf' handling in the OpenMP runtime (PR #123670)

[Matt Arsenault via llvm-commits]

arsenm wrote:

The printf binding pass should be added by clang, not the backend. It's specific to that path for OpenCL. Plus, the pass does respect nobuiltin 

https://github.com/llvm/llvm-project/pull/123670