A multi-layer 2D image can be copied to and from a 3D image.

Bug b/119620767

Change-Id: Idcee857ab50845702bbcd7826ed8739ed91f2791
Tests: dEQP-VK.api.copy_and_blit.*d_to_*
Reviewed-on: https://swiftshader-review.googlesource.com/c/SwiftShader/+/30948
Presubmit-Ready: Alexis Hétu <sugoi@google.com>
Kokoro-Presubmit: kokoro <noreply+kokoro@google.com>
Tested-by: Alexis Hétu <sugoi@google.com>
Reviewed-by: Chris Forbes <chrisforbes@google.com>