Add a texture copy test that does multiple layer copies Add a test that does multi-layer copy between a 2D array texture and a 3D texture of different formats. Bug: b/347306270 Change-Id: I972ae83f568450c27295a565af13f8e6d2332f66 Reviewed-on: https://chromium-review.googlesource.com/c/angle/angle/+/5634376 Commit-Queue: Shahbaz Youssefi <syoussefi@chromium.org> Reviewed-by: Amirali Abdolrashidi <abdolrashidi@google.com> Reviewed-by: Shahbaz Youssefi <syoussefi@chromium.org>