### 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_menu == grid->layer_count) {
		ProjectSettingsEditor::get_singleton()->popup_project_settings();
		ProjectSettingsEditor::get_singleton()->set_general_page(basename);
	} else {
		if (grid->value & (1 << p_menu)) {
			grid->value &= ~(1 << p_menu);
		} else {
			grid->value |= (1 << p_menu);
		}
		grid->queue_redraw();
		layers->set_item_checked(layers->get_item_index(p_menu), grid->value & (1 << p_menu));
		_grid_changed(grid->value);
	}
}
void EditorPropertyLayers::_refresh_names() {