E2E tests fail to pass with backend validation. Disable these tests
until there is resolution from the investigation.
BUG=dawn:462
Change-Id: I0325bafb31cc706be122a601ecfe154bf8880b5b
Reviewed-on: https://dawn-review.googlesource.com/c/dawn/+/25680
Commit-Queue: Bryan Bernhart <bryan.bernhart@intel.com>
Reviewed-by: Austin Eng <enga@chromium.org>
Reviewed-by: Corentin Wallez <cwallez@chromium.org>