Remove suppression for BindGroupTests.MultipleBindLayouts on Metal

The padded matrix issue in MSL has been fixed in SPIRV-Cross, and
it's updated in https://dawn-review.googlesource.com/c/dawn/+/13421,
so we can add BindGroupTests.MultipleBindLayouts back.

Bug: dawn:33
Change-Id: I8847ab536ebfd779219a1c6d0e1a9a128adf7e85
Reviewed-on: https://dawn-review.googlesource.com/c/dawn/+/13560
Commit-Queue: Hao Li <hao.x.li@intel.com>
Reviewed-by: Jiawei Shao <jiawei.shao@intel.com>
Reviewed-by: Corentin Wallez <cwallez@chromium.org>

src/tests/end2end/BindGroupTests.cpp

@@ -332,10 +332,6 @@ TEST_P(BindGroupTests, UBOSamplerAndTexture) {
 }
 
 TEST_P(BindGroupTests, MultipleBindLayouts) {
-    // Test fails on Metal.
-    // https://bugs.chromium.org/p/dawn/issues/detail?id=33
-    DAWN_SKIP_TEST_IF(IsMetal());
-
     utils::BasicRenderPass renderPass = utils::CreateBasicRenderPass(device, kRTSize, kRTSize);
 
     wgpu::ShaderModule vsModule =