### 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 (changing_type_index < 0) {
		Variant value;
		VariantInternal::initialize(&value, Variant::Type(p_index));
		if (changing_type_index == -1) {
			object->set_new_item_key(value);
		} else {
			object->set_new_item_value(value);
		}
		update_property();
		return;
	}
	Dictionary dict = object->get_dict().duplicate();
	if (p_index < Variant::VARIANT_MAX) {
		Variant value;
		VariantInternal::initialize(&value, Variant::Type(p_index));
		Variant key = dict.get_key_at_index(changing_type_index);
		dict[key] = value;
	} else {
		Variant key = dict.get_key_at_index(changing_type_index);
		dict.erase(key);
	}
	emit_changed(get_edited_property(), dict, "", false);
	update_property();
}
void EditorPropertyDictionary::setup(PropertyHint p_hint) {