### 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
return _is_drop_valid(p_data);
}
void EditorPropertyArray::drop_data_fw(const Point2 &p_point, const Variant &p_data, Control *p_from) {
	ERR_FAIL_COND(!_is_drop_valid(p_data));
	Dictionary drag_data = p_data;
	if (drag_data.has("type") && String(drag_data["type"]) == "files") {
		Vector<String> files = drag_data["files"];
		Variant array = object->get_array();
		
		if (!array.is_array()) {
			initialize_array(array);
		} else {
			array = array.duplicate();
		}
		
		for (int i = 0; i < files.size(); i++) {
			String file = files[i];
			Ref<Resource> res = ResourceLoader::load(file);
			if (res.is_valid()) {
				array.call("push_back", res);
			}
		}
		emit_changed(get_edited_property(), array, "", false);
		update_property();
	}
}
void EditorPropertyArray::_notification(int p_what) {