### 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
if (p_property.begins_with("indices")) {
		int index = p_property.get_slice("/", 1).to_int();
		Variant array = object->get_array().duplicate();
		array.set(index, p_value);
		object->set_array(array);
		emit_changed(get_edited_property(), array, "", true);
	}
}
void EditorPropertyArray::_change_type(Object *p_button, int p_index) {
	Button *button = Object::cast_to<Button>(p_button);
	changing_type_index = p_index;
	Rect2 rect = button->get_screen_rect();
	change_type->reset_size();
	change_type->set_position(rect.get_end() - Vector2(change_type->get_contents_minimum_size().x, 0));
	change_type->popup();
}
void EditorPropertyArray::_change_type_menu(int p_index) {
	if (p_index == Variant::VARIANT_MAX) {
		_remove_pressed(changing_type_index);
		return;
	}
	Variant value;
	VariantInternal::initialize(&value, Variant::Type(p_index));
	Variant array = object->get_array().duplicate();
	array.set(changing_type_index, value);
	emit_changed(get_edited_property(), array, "", true);
	update_property();
}
void EditorPropertyArray::_object_id_selected(const StringName &p_property, ObjectID p_id) {