Implement D3D12 Native Render Passes

Uses D3D12 native render pass API when possible. On pre-RS5 builds of
Windows, Dawn will fall back to a software emulated render pass. A
toggle was added to provide test coverage to the emulated render pass
implementation and used in tests that test render pass functionality in
particular.

Bug: dawn:36
Change-Id: I297a3ec7655b68d28204db2d3ab78cb82bb4e7a5
Reviewed-on: https://dawn-review.googlesource.com/c/dawn/+/13082
Reviewed-by: Austin Eng <enga@chromium.org>
Commit-Queue: Brandon Jones <brandon1.jones@intel.com>

src/tests/end2end/MultisampledRenderingTests.cpp

@@ -506,6 +506,7 @@ TEST_P(MultisampledRenderingTest, ResolveInto2DArrayTexture) {
 DAWN_INSTANTIATE_TEST(MultisampledRenderingTest,
                       D3D12Backend,
                       ForceWorkarounds(D3D12Backend, {}, {"use_d3d12_resource_heap_tier2"}),
+                      ForceWorkarounds(D3D12Backend, {}, {"use_d3d12_render_pass"}),
                       MetalBackend,
                       OpenGLBackend,
                       VulkanBackend,

src/tests/end2end/RenderPassTests.cpp

@@ -171,4 +171,9 @@ TEST_P(RenderPassTest, NoCorrespondingFragmentShaderOutputs) {
     EXPECT_PIXEL_RGBA8_EQ(kRed, renderTarget, kRTSize - 1, 1);
 }
 
-DAWN_INSTANTIATE_TEST(RenderPassTest, D3D12Backend, MetalBackend, OpenGLBackend, VulkanBackend);
+DAWN_INSTANTIATE_TEST(RenderPassTest,
+                      D3D12Backend,
+                      ForceWorkarounds(D3D12Backend, {}, {"use_d3d12_render_pass"}),
+                      MetalBackend,
+                      OpenGLBackend,
+                      VulkanBackend);

src/tests/end2end/TextureZeroInitTests.cpp

@@ -779,5 +779,8 @@ TEST_P(TextureZeroInitTest, RenderingLoadingDepthStencilStoreOpClear) {
 DAWN_INSTANTIATE_TEST(
     TextureZeroInitTest,
     ForceWorkarounds(D3D12Backend, {"nonzero_clear_resources_on_creation_for_testing"}),
+    ForceWorkarounds(D3D12Backend,
+                     {"nonzero_clear_resources_on_creation_for_testing"},
+                     {"use_d3d12_render_pass"}),
     ForceWorkarounds(OpenGLBackend, {"nonzero_clear_resources_on_creation_for_testing"}),
     ForceWorkarounds(VulkanBackend, {"nonzero_clear_resources_on_creation_for_testing"}));