### 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
switch (p_what) {
		case NOTIFICATION_ENTER_TREE:
		case NOTIFICATION_THEME_CHANGED: {
			const Color *colors = _get_property_colors();
			for (int i = 0; i < 16; i++) {
				spin[i]->add_theme_color_override("label_color", colors[i % 4]);
			}
		} break;
	}
}
void EditorPropertyProjection::_bind_methods() {
}
void EditorPropertyProjection::setup(double p_min, double p_max, double p_step, bool p_hide_slider, const String &p_suffix) {