[clang] [llvm] [mlir] [AMDGPU] Fix missing cache bypass scope on seq_cst buffer fat pointer atomics (PR #213585)

[Arseniy Obolenskiy via cfe-commits]

aobolensk wrote:

> Ok, now that I'm re-reading this, it's time for a PR split

Create a PR that should be merged before this with "atomicity" operand bundle: https://github.com/llvm/llvm-project/pull/223298

https://github.com/llvm/llvm-project/pull/213585