[clang] [Clang][OpenCL][AMDGPU] Allow a kernel to call another kernel (PR #115821)

[Aaron Ballman via cfe-commits]

AaronBallman wrote:

> If you feel that there's a technical reason that the compiler output is no longer reasonable, you are welcome to bring it up as a technical argument. My point is simply that "my transform stopped working because clang's compiler output changed" is not, in and of itself, clang's problem to solve.

Agreed; while we aim to not be disruptive with changes, such changes are expected and reasonable.

@BukeBeyond -- please familiarize yourself with our community [Code of Conduct](https://llvm.org/docs/CodeOfConduct.html). Telling people who they are speaking for, accusing people of malicious intent, and demeaning people are not in line with our community standards. Editing your comments and/or adding a small apology would be appropriate.

https://github.com/llvm/llvm-project/pull/115821