### 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();
		Dictionary dict = object->get_dict().duplicate();
		Variant key = dict.get_key_at_index(index);
		dict[key] = p_value;
		object->set_dict(dict);
		emit_changed(get_edited_property(), dict, "", true);
	}
}
void EditorPropertyLocalizableString::_add_locale_popup() {
	locale_select->popup_locale_dialog();
}
void EditorPropertyLocalizableString::_add_locale(const String &p_locale) {
	Dictionary dict = object->get_dict().duplicate();
	object->set_new_item_key(p_locale);
	object->set_new_item_value(String());
	dict[object->get_new_item_key()] = object->get_new_item_value();
	emit_changed(get_edited_property(), dict, "", false);
	update_property();
}
void EditorPropertyLocalizableString::_remove_item(Object *p_button, int p_index) {