Suppress WebGPU tests flaky on Mac

webgpu:api,validation,render_pipeline,fragment_state:targets_format_renderable:isAsync=true;format="rg8uint"
webgpu:api,validation,render_pipeline,vertex_state:vertex_attribute_offset_alignment:*

Bug: chromium:1444865
Change-Id: Ifadf8dd376198947589fa1de7b6dd33a5986ee38
Reviewed-on: https://dawn-review.googlesource.com/c/dawn/+/133380
Commit-Queue: Austin Eng <enga@chromium.org>
Kokoro: Austin Eng <enga@chromium.org>
Reviewed-by: Austin Eng <enga@chromium.org>
Auto-Submit: Yuly Novikov <ynovikov@chromium.org>
diff --git a/webgpu-cts/expectations.txt b/webgpu-cts/expectations.txt
index 5298ee1..d37d810 100644
--- a/webgpu-cts/expectations.txt
+++ b/webgpu-cts/expectations.txt
@@ -513,6 +513,12 @@
 crbug.com/dawn/1783 webgpu:shader,execution,expression,binary,* [ Slow ]
 
 ################################################################################
+# Flaky FATAL in gpu::raster::GrShaderCache::load()
+################################################################################
+crbug.com/1444865 [ mac ] webgpu:api,validation,render_pipeline,fragment_state:targets_format_renderable:isAsync=true;format="rg8uint" [ RetryOnFailure ]
+crbug.com/1444865 [ mac ] webgpu:api,validation,render_pipeline,vertex_state:vertex_attribute_offset_alignment:* [ RetryOnFailure ]
+
+################################################################################
 # untriaged failures
 ################################################################################
 crbug.com/dawn/0000 [ dawn-backend-validation win10 ] webgpu:api,operation,render_pass,resolve:* [ Failure ]
@@ -599,11 +605,6 @@
 crbug.com/dawn/0000 [ dawn-backend-validation ventura ] webgpu:api,validation,render_pipeline,depth_stencil_state:format:isAsync=false;format="rgb9e5ufloat" [ RetryOnFailure ]
 crbug.com/dawn/0000 [ ventura ] webgpu:api,validation,render_pipeline,fragment_state:targets_blend:isAsync=false;component="color" [ RetryOnFailure ]
 crbug.com/dawn/0000 [ dawn-no-backend-validation monterey ] webgpu:api,validation,render_pipeline,overrides:identifier,vertex:isAsync=true;vertexConstants={"%E6%95%B0":1} [ RetryOnFailure ]
-crbug.com/dawn/0000 [ amd-0x67ef dawn-backend-validation ventura ] webgpu:api,validation,render_pipeline,vertex_state:vertex_attribute_offset_alignment:format="float32x3";arrayStride=256;offset=240 [ RetryOnFailure ]
-crbug.com/dawn/0000 [ dawn-backend-validation intel-0x3e9b ventura ] webgpu:api,validation,render_pipeline,vertex_state:vertex_attribute_offset_alignment:format="float32x3";arrayStride=256;offset=240 [ RetryOnFailure ]
-crbug.com/dawn/0000 [ dawn-no-backend-validation intel-0x3e9b monterey ] webgpu:api,validation,render_pipeline,vertex_state:vertex_attribute_offset_alignment:format="float32x3";arrayStride=256;offset=240 [ RetryOnFailure ]
-crbug.com/dawn/0000 [ dawn-no-backend-validation intel-0x3e9b ventura ] webgpu:api,validation,render_pipeline,vertex_state:vertex_attribute_offset_alignment:format="float32x3";arrayStride=256;offset=240 [ RetryOnFailure ]
-crbug.com/dawn/0000 [ dawn-no-backend-validation monterey ] webgpu:api,validation,render_pipeline,vertex_state:vertex_attribute_offset_alignment:format="uint32";arrayStride=2048;offset=2 [ RetryOnFailure ]
 crbug.com/dawn/0000 [ dawn-backend-validation win10 ] webgpu:api,validation,state,device_lost,destroy:createView,2d,compressed_format:format="bc6h-rgb-ufloat" [ RetryOnFailure ]
 crbug.com/dawn/0000 [ dawn-backend-validation win10 ] webgpu:api,validation,state,device_lost,destroy:createView,2d,uncompressed_format:format="bgra8unorm-srgb" [ RetryOnFailure ]
 crbug.com/dawn/0000 [ dawn-backend-validation intel-0x3e9b monterey ] webgpu:shader,execution,expression,call,builtin,abs:f32:inputSource="storage_r";vectorize=3 [ RetryOnFailure ]