refactor(srp): move shadow caster stage selection into managed urp

- add standalone pass asset factories for camera frame stages\n- let managed pipeline assets declare stage pass asset keys\n- make universal renderer data explicitly own the builtin shadow caster stage

engine/src/Rendering/Execution/Internal/CameraFrameGraph/PassRecorder.cpp

@@ -31,7 +31,8 @@ bool TryRecordCameraFrameStageStandaloneRenderGraphPass(
     RenderPass* const standaloneStagePass =
         ResolveCameraFrameStandaloneStagePass(
             stageState.stage,
-            builder.executionState);
+            builder.executionState,
+            context.plan.request.rendererIndex);
     if (standaloneStagePass == nullptr ||
         !standaloneStagePass->SupportsRenderGraph()) {
         handled = false;

engine/src/Rendering/Execution/Internal/CameraFrameGraph/StageContract.cpp

@@ -217,9 +217,12 @@ RenderSceneData BuildCameraFrameStandaloneStageSceneData(
 
 RenderPass* ResolveCameraFrameStandaloneStagePass(
     CameraFrameStage stage,
-    CameraFrameExecutionState& executionState) {
+    CameraFrameExecutionState& executionState,
+    int32_t rendererIndex) {
     return executionState.pipeline != nullptr
-        ? executionState.pipeline->GetCameraFrameStandalonePass(stage)
+        ? executionState.pipeline->GetCameraFrameStandalonePass(
+            stage,
+            rendererIndex)
         : nullptr;
 }
 
@@ -256,7 +259,8 @@ bool ExecuteCameraFrameRecordedStagePass(
         RenderPass* const standaloneStagePass =
             ResolveCameraFrameStandaloneStagePass(
                 stage,
-                executionState);
+                executionState,
+                context.plan.request.rendererIndex);
         return ExecuteCameraFrameStandaloneStagePass(
             standaloneStagePass,
             context.plan.request.context,

engine/src/Rendering/Execution/Internal/CameraFrameGraph/StageContract.h

@@ -47,7 +47,8 @@ RenderSceneData BuildCameraFrameStandaloneStageSceneData(
 
 RenderPass* ResolveCameraFrameStandaloneStagePass(
     CameraFrameStage stage,
-    CameraFrameExecutionState& executionState);
+    CameraFrameExecutionState& executionState,
+    int32_t rendererIndex);
 
 bool InitializeCameraFrameStandaloneStagePass(
     RenderPass* pass,