Implement atomic load/store memory ordering

Implement atomic load/store memory ordering

Bug b/127472316

Test: dEQP-VK.spirv_assembly.instruction.compute.opatomic.load
Test: dEQP-VK.spirv_assembly.instruction.compute.opatomic.store
Change-Id: I0379a1a74bc9742a3a9ae4d52b319e0838fd21bf
Reviewed-on: https://swiftshader-review.googlesource.com/c/SwiftShader/+/27728
Presubmit-Ready: Nicolas Capens <nicolascapens@google.com>
Tested-by: Nicolas Capens <nicolascapens@google.com>
Kokoro-Presubmit: kokoro <noreply+kokoro@google.com>
Reviewed-by: Chris Forbes <chrisforbes@google.com>