Fix HDRP tests with by enabling backbuffer instead of render texture (#2898)

* add missing [UnityTest] attribute and use WaitForEndOfFrame

* activate UseBackBuffer on SSR and SSAO scenes

* update reference images for win editor

* Update Vulkan linux screenshots

* add missing config file to disable batch mode for DXR tests

* increase VFX tests timeout to handle complex scenes with many shaders and XR variants

Co-authored-by: Sebastien Lagarde <sebastien@unity3d.com>

Author: fabien-unity

TestProjects/HDRP_DXR_Tests/TestRunnerOptions.json

@@ -0,0 +1,7 @@
+{
+    "disableBatchMode": true,
+    "allowedGraphicsTarget": {
+        "metal": ["amd"]
+    }
+}
+  

TestProjects/HDRP_Tests/Assets/GraphicTests/Scenes/2x_Lighting/2551_SSR.unity

@@ -844,6 +844,16 @@ PrefabInstance:
       propertyPath: waitFrames
       value: 2
       objectReference: {fileID: 0}
+    - target: {fileID: 114995348509370400, guid: c07ace9ab142ca9469fa377877c2f1e7,
+        type: 3}
+      propertyPath: ImageComparisonSettings.UseBackBuffer
+      value: 1
+      objectReference: {fileID: 0}
+    - target: {fileID: 114995348509370400, guid: c07ace9ab142ca9469fa377877c2f1e7,
+        type: 3}
+      propertyPath: ImageComparisonSettings.ImageResolution
+      value: 4
+      objectReference: {fileID: 0}
     - target: {fileID: 114777190906822814, guid: c07ace9ab142ca9469fa377877c2f1e7,
         type: 3}
       propertyPath: m_RenderingPathCustomFrameSettings.bitDatas.data1

TestProjects/HDRP_Tests/Assets/GraphicTests/Scenes/2x_Lighting/2601_SSAO_HalfRes.unity

@@ -518,6 +518,16 @@ PrefabInstance:
       propertyPath: renderGraphCompatible
       value: 1
       objectReference: {fileID: 0}
+    - target: {fileID: 114995348509370400, guid: c07ace9ab142ca9469fa377877c2f1e7,
+        type: 3}
+      propertyPath: ImageComparisonSettings.UseBackBuffer
+      value: 1
+      objectReference: {fileID: 0}
+    - target: {fileID: 114995348509370400, guid: c07ace9ab142ca9469fa377877c2f1e7,
+        type: 3}
+      propertyPath: ImageComparisonSettings.ImageResolution
+      value: 4
+      objectReference: {fileID: 0}
     m_RemovedComponents: []
   m_SourcePrefab: {fileID: 100100000, guid: c07ace9ab142ca9469fa377877c2f1e7, type: 3}
 --- !u!1 &1820961444

TestProjects/HDRP_Tests/Assets/GraphicTests/Scenes/2x_Lighting/2602_SSAO_FullRes.unity

@@ -513,6 +513,16 @@ PrefabInstance:
       propertyPath: renderGraphCompatible
       value: 1
       objectReference: {fileID: 0}
+    - target: {fileID: 114995348509370400, guid: c07ace9ab142ca9469fa377877c2f1e7,
+        type: 3}
+      propertyPath: ImageComparisonSettings.UseBackBuffer
+      value: 1
+      objectReference: {fileID: 0}
+    - target: {fileID: 114995348509370400, guid: c07ace9ab142ca9469fa377877c2f1e7,
+        type: 3}
+      propertyPath: ImageComparisonSettings.ImageResolution
+      value: 4
+      objectReference: {fileID: 0}
     m_RemovedComponents: []
   m_SourcePrefab: {fileID: 100100000, guid: c07ace9ab142ca9469fa377877c2f1e7, type: 3}
 --- !u!1 &908551372