[llvm] [AMDGPU] Emit AMDHSA kernel descriptors to `.amdhsa.kd` section (PR #122930)

[Joseph Huber via llvm-commits]

jhuber6 wrote:

> Do we need ROCm runtime change in place before this change?

I don't think so, but I'll do some more tests in the meantime.

https://github.com/llvm/llvm-project/pull/122930