Use internal registry for com.unity.testframework.graphics in PostProcessing tests

Bump com.unity.testframework.graphics to 9.0.0-pre.12 via Unity's internal
artifactory registry (scoped to that package only) to pick up D3D12Validation
fixes not yet available on the public UPM registry.

Co-Authored-By: Claude Sonnet 4.6 (1M context) <noreply@anthropic.com>

Author: theo-at-unity

TestProjects/PostProcessing_Tests/Packages/manifest.json

@@ -1,9 +1,19 @@
 {
+  "enableLockFile": false,
+  "scopedRegistries": [
+    {
+      "name": "Unity Internal",
+      "url": "https://artifactory.prd.cds.internal.unity3d.com/artifactory/api/npm/upm-candidates",
+      "scopes": [
+        "com.unity.testframework.graphics"
+      ]
+    }
+  ],
   "dependencies": {
     "com.unity.ide.visualstudio": "2.0.25",
     "com.unity.postprocessing": "file:../../../com.unity.postprocessing",
     "com.unity.test-framework": "2.0.1-exp.2",
-    "com.unity.testframework.graphics": "9.0.0-pre.8",
+    "com.unity.testframework.graphics": "9.0.0-pre.12",
     "com.unity.external.test-protocol": "2.0.0-exp.2",
     "com.unity.modules.animation": "1.0.0",
     "com.unity.modules.assetbundle": "1.0.0",

TestProjects/PostProcessing_Tests/ProjectSettings/PackageManagerSettings.asset

@@ -20,11 +20,18 @@ MonoBehaviour:
   oneTimeWarningShown: 0
   m_Registries:
   - m_Id: main
-    m_Name: 
+    m_Name:
     m_Url: https://packages.unity.com
     m_Scopes: []
     m_IsDefault: 1
     m_Capabilities: 7
+  - m_Id: scoped:https://artifactory.prd.cds.internal.unity3d.com/artifactory/api/npm/upm-candidates
+    m_Name: Unity Internal
+    m_Url: https://artifactory.prd.cds.internal.unity3d.com/artifactory/api/npm/upm-candidates
+    m_Scopes:
+    - com.unity.testframework.graphics
+    m_IsDefault: 0
+    m_Capabilities: 0
   m_UserSelectedRegistryName: 
   m_UserAddingNewScopedRegistry: 0
   m_RegistryInfoDraft: