### 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;
	}
	const Ref<InputEventMouseButton> mb = p_ev;
	if (mb.is_valid() && mb->get_button_index() == MouseButton::LEFT && mb->is_pressed()) {
		if (hovered_index >= 0) {
			
			
			if (value & (1 << hovered_index)) {
				value &= ~(1 << hovered_index);
			} else {
				value |= (1 << hovered_index);
			}
			emit_signal(SNAME("flag_changed"), value);
			queue_redraw();
		} else if (expand_hovered) {
			expanded = !expanded;
			update_minimum_size();
			queue_redraw();
		}
	}
	if (mb.is_valid() && mb->get_button_index() == MouseButton::RIGHT && mb->is_pressed()) {
		if (hovered_index >= 0) {
			renamed_layer_index = hovered_index;
			layer_rename->set_position(get_screen_position() + mb->get_position());
			layer_rename->reset_size();
			layer_rename->popup();
		}
	}
}
void EditorPropertyLayersGrid::_notification(int p_what) {