Disable DepthStencilStateTest tests on D3D12 + WARP

Bug: dawn:737
Change-Id: I55d22ad54fe3983bbae67572a428d01a64e634e3
Reviewed-on: https://dawn-review.googlesource.com/c/dawn/+/46362
Commit-Queue: Ben Clayton <bclayton@google.com>
Reviewed-by: Corentin Wallez <cwallez@chromium.org>

src/tests/end2end/DepthStencilStateTests.cpp

@@ -25,6 +25,9 @@ class DepthStencilStateTest : public DawnTest {
     void SetUp() override {
         DawnTest::SetUp();
 
+        // TODO(crbug.com/dawn/737): Test output is wrong with D3D12 + WARP.
+        DAWN_SKIP_TEST_IF(IsD3D12() && IsWARP());
+
         wgpu::TextureDescriptor renderTargetDescriptor;
         renderTargetDescriptor.dimension = wgpu::TextureDimension::e2D;
         renderTargetDescriptor.size.width = kRTSize;