### Godot version

9f12e7b52d944

### System information

arch linux

### Issue description

Attempting to edit from the editor a typed array exported from a tool script fails, any value is immediately reset, setters are never called.

### Steps to reproduce

Create a script such as follows and try to add and then change items of the array in the inspector.


```gdscript
@tool
extends Node

@export var x: Array[String]
```

### Minimal reproduction project

n/a
Node *to_node = get_node(p_path);
	if (!Object::cast_to<Viewport>(to_node)) {
		EditorNode::get_singleton()->show_warning(TTR("Selected node is not a Viewport!"));
		return;
	}
	Ref<ViewportTexture> vt;
	vt.instantiate();
	vt->set_viewport_path_in_scene(get_tree()->get_edited_scene_root()->get_path_to(to_node));
	emit_changed(get_edited_property(), vt);
	update_property();
}
void EditorPropertyResource::setup(Object *p_object, const String &p_path, const String &p_base_type) {