### Godot version

4.0.beta13 (caacade56)

### System information

Windows 10

### Issue description

Seems like this was missed in #62011 and #70540. `@export_multiline` should also support the PackedStringArray datatype on top of Array[String] and Dictionary, but it doesn't, instead giving the error `"@export_multiline" annotation requires a variable of type "String" but type "PackedStringArray" was given instead.`

### Steps to reproduce

Create a PackedStringArray with the `@export_multiline` annotation.
```gdscript
@export_multiline var npc_dialog: PackedStringArray
```

### 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));
	vt->setup_local_to_scene();
	emit_changed(get_edited_property(), vt);
	update_property();
}
void EditorPropertyResource::setup(Object *p_object, const String &p_path, const String &p_base_type) {