### 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
container->set_theme_type_variation("MarginContainer4px");
			add_child(container);
			set_bottom_editor(container);
			VBoxContainer *vbox = memnew(VBoxContainer);
			container->add_child(vbox);
			property_vbox = memnew(VBoxContainer);
			property_vbox->set_h_size_flags(SIZE_EXPAND_FILL);
			vbox->add_child(property_vbox);
			paginator = memnew(EditorPaginator);
			paginator->connect("page_changed", callable_mp(this, &EditorPropertyLocalizableString::_page_changed));
			vbox->add_child(paginator);
		} else {
			
			for (int i = property_vbox->get_child_count() - 1; i >= 0; i--) {
				property_vbox->get_child(i)->queue_free();
			}
		}
		int size = dict.size();
		int max_page = MAX(0, size - 1) / page_length;
		page_index = MIN(page_index, max_page);
		paginator->update(page_index, max_page);
		paginator->set_visible(max_page > 0);
		int offset = page_index * page_length;
		int amount = MIN(size - offset, page_length);
		for (int i = 0; i < amount; i++) {
			String prop_name;
			Variant key;
			Variant value;
			prop_name = "indices/" + itos(i + offset);
			key = dict.get_key_at_index(i + offset);