Update ToUnstructured to handle already unstructured case

This version of the function is more robus, it's what is used in
Timoni, updating it hear would alow avoid copies in other places.

ssa/normalize/normalize.go

@@ -64,12 +64,18 @@ func FromUnstructuredWithScheme(object *unstructured.Unstructured, scheme *runti
 
 // ToUnstructured converts a typed Kubernetes resource into the Unstructured
 // equivalent.
-func ToUnstructured(object metav1.Object) (*unstructured.Unstructured, error) {
-	u, err := runtime.DefaultUnstructuredConverter.ToUnstructured(object)
+func ToUnstructured(obj runtime.Object) (*unstructured.Unstructured, error) {
+	// If the incoming object is already unstructured, perform a deep copy first
+	// otherwise DefaultUnstructuredConverter ends up returning the inner map without
+	// making a copy.
+	if _, ok := obj.(runtime.Unstructured); ok {
+		obj = obj.DeepCopyObject()
+	}
+	rawMap, err := runtime.DefaultUnstructuredConverter.ToUnstructured(obj)
 	if err != nil {
 		return nil, err
 	}
-	return &unstructured.Unstructured{Object: u}, nil
+	return &unstructured.Unstructured{Object: rawMap}, nil
 }
 
 // UnstructuredList normalizes a list of Unstructured objects by