Use Array for node configuration warnings

Previously, the warnings were passed as a string and delimitation of which were hard coded at each implementation.

scene/2d/remote_transform_2d.h

@@ -70,7 +70,7 @@ public:
 
 	void force_update_cache();
 
-	virtual String get_configuration_warning() const override;
+	TypedArray<String> get_configuration_warnings() const override;
 
 	RemoteTransform2D();
 };