[clang] [flang] [llvm] [Clang][AMDGPU] Expose buffer load lds as a clang builtin (PR #132048)

[Juan Manuel Martinez Caamaño via cfe-commits]

jmmartinez wrote:

Squashed and split in 2: https://github.com/llvm/llvm-project/pull/133055

https://github.com/llvm/llvm-project/pull/132048