[libclc] [libclc] Stop installing CLC headers (PR #126908)

[Matt Arsenault via cfe-commits]

arsenm wrote:

I suppose we could interpret the environment part of the triple to influence the target's reported set of extensions (plus consolidate all of these defines into the compiler). Do we even get consistent behavior when using -fdeclare-opencl-bulitins? I could believe we could just delete the header defines without any issue 

https://github.com/llvm/llvm-project/pull/126908