Add checks for quad overdraw and triangle size overlays on mac

* These features aren't supported by the underlying implementation.
* Triangle size we can feature-detect properly - by checking for geometry shader
  support. Quad resolve should be supported but metal doesn't allow atomics on
  images so we have to check specifically for a metal backend.

renderdoc/driver/vulkan/vk_shader_cache.cpp

@@ -70,7 +70,7 @@ static const BuiltinShaderConfig builtinShaders[] = {
     {BuiltinShader::QuadResolveFS, EmbeddedResource(glsl_quadresolve_frag),
      SPIRVShaderStage::Fragment, FeatureCheck::FragmentStores, true},
     {BuiltinShader::QuadWriteFS, EmbeddedResource(glsl_quadwrite_frag), SPIRVShaderStage::Fragment,
-     FeatureCheck::FragmentStores, false},
+     FeatureCheck::FragmentStores | FeatureCheck::NonMetalBackend, false},
     {BuiltinShader::TrisizeGS, EmbeddedResource(glsl_trisize_geom), SPIRVShaderStage::Geometry,
      FeatureCheck::NoCheck, true},
     {BuiltinShader::TrisizeFS, EmbeddedResource(glsl_trisize_frag), SPIRVShaderStage::Fragment,