### Godot version

4.0.3.stable

### System information

windows 11

### Issue description

fullscreen on the window node is not working and will show up as a windowed.

### Steps to reproduce

disable Embed Subwindows in Project Settings/Display/Window.
create a window node and set its mode to fullscreen.

### Minimal reproduction project

[fullscreen.zip](https://github.com/godotengine/godot/files/11821834/fullscreen.zip)
} else if (transient_parent->exclusive_child != this) {
				ERR_PRINT("Making child transient exclusive, but parent has another exclusive child");
			}
		}
	}
	
	if (transient_parent->window_id != DisplayServer::INVALID_WINDOW_ID && window_id != DisplayServer::INVALID_WINDOW_ID) {
		DisplayServer::get_singleton()->window_set_transient(window_id, transient_parent->window_id);
	}
}
void Window::set_transient(bool p_transient) {
	ERR_MAIN_THREAD_GUARD;
	if (transient == p_transient) {
		return;
	}
	transient = p_transient;
	if (!is_inside_tree()) {
		return;
	}
	if (transient) {
		_make_transient();
	} else {
		_clear_transient();
	}
}
bool Window::is_transient() const {
	ERR_READ_THREAD_GUARD_V(false);
	return transient;
}
void Window::set_exclusive(bool p_exclusive) {