Disable SamplerTests on NVIDIA D3D11

Suspect to be causing flakes in D3D12 sampler tests

Bug: dawn:1779
Change-Id: I7a8518683142191e05c7befed078d69abdaf9b77
Reviewed-on: https://dawn-review.googlesource.com/c/dawn/+/129280
Reviewed-by: Loko Kung <lokokung@google.com>
Kokoro: Kokoro <noreply+kokoro@google.com>
Commit-Queue: Austin Eng <enga@chromium.org>

src/dawn/tests/end2end/SamplerTests.cpp

@@ -53,6 +53,11 @@ class SamplerTest : public DawnTest {
   protected:
     void SetUp() override {
         DawnTest::SetUp();
+
+        // TODO(crbug.com/dawn/1779): D3D11 sampler tests seem to cause flakes in D3D12 sampler
+        // tests.
+        DAWN_SUPPRESS_TEST_IF(IsNvidia() && IsD3D11());
+
         mRenderPass = utils::CreateBasicRenderPass(device, kRTSize, kRTSize);
 
         wgpu::TextureDescriptor descriptor;