### 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
dropping = true;
					edit->queue_redraw();
				}
			}
		} break;
		case NOTIFICATION_DRAG_END: {
			if (dropping) {
				dropping = false;
				edit->queue_redraw();
			}
		} break;
	}
}
void EditorPropertyArray::_edit_pressed() {
	Variant array = get_edited_object()->get(get_edited_property());
	if (!array.is_array() && edit->is_pressed()) {
		initialize_array(array);
		get_edited_object()->set(get_edited_property(), array);
	}
	get_edited_object()->editor_set_section_unfold(get_edited_property(), edit->is_pressed());
	update_property();
}
void EditorPropertyArray::_page_changed(int p_page) {
	if (updating) {
		return;
	}
	page_index = p_page;
	update_property();
}
void EditorPropertyArray::_length_changed(double p_page) {