[llvm] [SPIRV] Lower load/store atomic to OpAtomicLoad/OpAtomicStore (PR #185696)

[Juan Manuel Martinez Caamaño via llvm-commits]

jmmartinez wrote:

In the last commit I've combined the `StorageClass` and the `AtomicOrdering` https://github.com/llvm/llvm-project/pull/185696/changes/867ac2caeb161cc652df051f99c4e2ef6d3a0960


https://github.com/llvm/llvm-project/pull/185696