### 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
uint32_t value = get_edited_object()->get(get_edited_property());
	grid->set_flag(value);
}
void EditorPropertyLayers::setup(LayerType p_layer_type) {
	layer_type = p_layer_type;
	int layer_group_size = 0;
	int layer_count = 0;
	switch (p_layer_type) {
		case LAYER_RENDER_2D: {
			basename = "layer_names/2d_render";
			layer_group_size = 5;
			layer_count = 20;
		} break;
		case LAYER_PHYSICS_2D: {
			basename = "layer_names/2d_physics";
			layer_group_size = 4;
			layer_count = 32;
		} break;
		case LAYER_NAVIGATION_2D: {
			basename = "layer_names/2d_navigation";
			layer_group_size = 4;
			layer_count = 32;
		} break;
		case LAYER_RENDER_3D: {
			basename = "layer_names/3d_render";
			layer_group_size = 5;
			layer_count = 20;
		} break;