[llvm] [mlir] [llvm][OpenMP] Handle complex types in atomic read (PR #111377)

[via llvm-commits]

NimishMishra wrote:

Thanks @tblah for testing this PR. Without this patch, I believe the assertion would be related to emitting an atomic read on non-integer types. 

I'll investigate on this and get back.

https://github.com/llvm/llvm-project/pull/111377