### 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
setup(layer_type);
}
void EditorPropertyLayers::_bind_methods() {
}
EditorPropertyLayers::EditorPropertyLayers() {
	HBoxContainer *hb = memnew(HBoxContainer);
	hb->set_clip_contents(true);
	add_child(hb);
	grid = memnew(EditorPropertyLayersGrid);
	grid->connect("flag_changed", callable_mp(this, &EditorPropertyLayers::_grid_changed));
	grid->connect("rename_confirmed", callable_mp(this, &EditorPropertyLayers::set_layer_name));
	grid->set_h_size_flags(SIZE_EXPAND_FILL);
	hb->add_child(grid);
	button = memnew(TextureButton);
	button->set_stretch_mode(TextureButton::STRETCH_KEEP_CENTERED);
	button->set_toggle_mode(true);
	button->connect("pressed", callable_mp(this, &EditorPropertyLayers::_button_pressed));
	hb->add_child(button);
	set_bottom_editor(hb);
	layers = memnew(PopupMenu);
	add_child(layers);
	layers->set_hide_on_checkable_item_selection(false);
	layers->connect("id_pressed", callable_mp(this, &EditorPropertyLayers::_menu_pressed));
	layers->connect("popup_hide", callable_mp((BaseButton *)button, &BaseButton::set_pressed).bind(false));
	EditorNode::get_singleton()->connect("project_settings_changed", callable_mp(this, &EditorPropertyLayers::_refresh_names));
}
void EditorPropertyInteger::_set_read_only(bool p_read_only) {