Suppress ClearThenMaskedClearFramebufferTest on Linux AMD VK The test has been failing on that configuration since it was introduced. TBR=syoussefi@chromium.org Bug: angleproject:5655 Change-Id: If852bcd574fa0cd4018220b7d6749b95a717a7c9 Reviewed-on: https://chromium-review.googlesource.com/c/angle/angle/+/2698117 Reviewed-by: Corentin Wallez <cwallez@chromium.org> Commit-Queue: Corentin Wallez <cwallez@chromium.org>