[clang] [llvm] [clang] Introduce target-specific `Sema` components (PR #93179)

[Vlad Serebrennikov via llvm-commits]

Endilll wrote:

> Should update the GitHub autolabeler paths for the targets if they don't get caught talready

AMDGPU has been already caught, I updated the rest. Thank you!

https://github.com/llvm/llvm-project/pull/93179