Fix bugs in the multi-layer copies with BC formats on D3D12 and OpenGL

This patch fixes two bugs in the copy commands with BC formats and
multiple array layers on D3D12 and OpenGL and adds two end2end tests as
the regression tests.

This patch also removes "viewArrayLayer" in the struct CopyConfig used
in CompressedTextureBCFormatTest and sets the base array layer into
CopyConfig.copyOrigin3D.z instead.

BUG=dawn:453
TEST=dawn_end2end_tests

Change-Id: I1c2e6b79fb7c44fc996655ab5a908e27ba8c4729
Reviewed-on: https://dawn-review.googlesource.com/c/dawn/+/24183
Reviewed-by: Corentin Wallez <cwallez@chromium.org>
Reviewed-by: Austin Eng <enga@chromium.org>
Commit-Queue: Corentin Wallez <cwallez@chromium.org>

src/dawn_native/opengl/CommandBufferGL.cpp

@@ -542,7 +542,7 @@ namespace dawn_native { namespace opengl {
                         ASSERT(texture->GetDimension() == wgpu::TextureDimension::e2D);
                         uint64_t copyDataSize = (copySize.width / formatInfo.blockWidth) *
                                                 (copySize.height / formatInfo.blockHeight) *
-                                                formatInfo.blockByteSize;
+                                                formatInfo.blockByteSize * copySize.depth;
                         Extent3D copyExtent = ComputeTextureCopyExtent(dst, copySize);
 
                         if (texture->GetArrayLayers() > 1) {