Preliminary Vulkan AS/RQ test

This test renders a small triangle that casts a shadow from a point light, onto a larger triangle.  The test runner then checks that various pixels in the final output are the correct colour.

There is also an arbitrary AS copy in the render loop just to hit more API coverage when manually capturing, but the test runner doesn't check its output.

Core test work originally done by [email protected]

util/test/demos/CMakeLists.txt

@@ -141,6 +141,7 @@ set(VULKAN_SRC
         vk/vk_pixel_history.cpp
         vk/vk_postponed.cpp
         vk/vk_query_pool.cpp
+        vk/vk_ray_query.cpp
         vk/vk_read_before_overwrite.cpp
         vk/vk_resource_lifetimes.cpp
         vk/vk_robustness2.cpp

util/test/demos/demos.vcxproj

@@ -331,6 +331,7 @@
     <ClCompile Include="vk\vk_multi_thread_windows.cpp" />
     <ClCompile Include="vk\vk_postponed.cpp" />
     <ClCompile Include="vk\vk_query_pool.cpp" />
+    <ClCompile Include="vk\vk_ray_query.cpp" />
     <ClCompile Include="vk\vk_read_before_overwrite.cpp" />
     <ClCompile Include="vk\vk_robustness2.cpp" />
     <ClCompile Include="vk\vk_separate_depth_stencil_layouts.cpp" />

util/test/demos/demos.vcxproj.filters

@@ -694,6 +694,9 @@
     <ClCompile Include="d3d12\d3d12_rtas_zoo.cpp">
       <Filter>D3D12\demos</Filter>
     </ClCompile>
+    <ClCompile Include="vk\vk_ray_query.cpp">
+      <Filter>Vulkan\demos</Filter>
+    </ClCompile>
   </ItemGroup>
   <ItemGroup>
     <Filter Include="D3D11">