Enable the mesh optimizer (#231)

Gems/SceneProcessing/Code/Source/Generation/Components/MeshOptimizer/MeshOptimizerComponent.cpp

@@ -102,6 +102,7 @@ namespace AZ::SceneGenerationComponents
 
     MeshOptimizerComponent::MeshOptimizerComponent()
     {
+        BindToCall(&MeshOptimizerComponent::OptimizeMeshes);
     }
 
     void MeshOptimizerComponent::Reflect(AZ::ReflectContext* context)
@@ -109,7 +110,7 @@ namespace AZ::SceneGenerationComponents
         auto* serializeContext = azrtti_cast<AZ::SerializeContext*>(context);
         if (serializeContext)
         {
-            serializeContext->Class<MeshOptimizerComponent, GenerationComponent>()->Version(1);
+            serializeContext->Class<MeshOptimizerComponent, GenerationComponent>()->Version(2);
         }
     }