The rotation calculations are a little different for this code (that
uses a special shader) than for other pre-rotation cases. I also
modified the CopyTexImageTestES3.2DArraySubImage test to make future
bugs a little easier to diagnose.
Test: Test: angle_end2end_tests --gtest_filter=*CopyTexImageTestES3.2DArraySubImage*Vulkan*
Test: Test: angle_end2end_tests --gtest_filter=*WebGLReadOutsideFramebufferTest.CopyTexSubImage2D*Vulkan*
Bug: b/158245571
Change-Id: I497ec541cae5cd4085c3e9d596ee20943f5510f9
Reviewed-on: https://chromium-review.googlesource.com/c/angle/angle/+/2275733Reviewed-by: Shahbaz Youssefi <syoussefi@chromium.org>
Reviewed-by: Geoff Lang <geofflang@chromium.org>
Commit-Queue: Ian Elliott <ianelliott@google.com>
