Enable most C* end-to-end tests on OpenGL ES.

This enables all the C* tests which are also enabled on desktop GL.

BUG=dawn:580

Change-Id: I71cf500a19fc4f81e0de47483d9b1de49df9bf76
Reviewed-on: https://dawn-review.googlesource.com/c/dawn/+/34500
Reviewed-by: Corentin Wallez <cwallez@chromium.org>
Reviewed-by: Austin Eng <enga@chromium.org>
Commit-Queue: Stephen White <senorblanco@chromium.org>
diff --git a/src/tests/end2end/CopyTests.cpp b/src/tests/end2end/CopyTests.cpp
index 98a1f091..4902ee6 100644
--- a/src/tests/end2end/CopyTests.cpp
+++ b/src/tests/end2end/CopyTests.cpp
@@ -1612,4 +1612,5 @@
                       D3D12Backend(),
                       MetalBackend(),
                       OpenGLBackend(),
+                      OpenGLESBackend(),
                       VulkanBackend());