[NFC][AMDGPU] Move `flat_atomic.ll` to `llvm/test/CodeGen/AMDGPU/` (#141126)
diff --git a/llvm/test/Transforms/InferAddressSpaces/AMDGPU/flat_atomic.ll b/llvm/test/CodeGen/AMDGPU/infer-addrspace-flat-atomic.ll similarity index 100% rename from llvm/test/Transforms/InferAddressSpaces/AMDGPU/flat_atomic.ll rename to llvm/test/CodeGen/AMDGPU/infer-addrspace-flat-atomic.ll