### 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)
_THREAD_SAFE_METHOD_
	ERR_FAIL_COND_V(!windows.has(p_window), Point2i());
	const WindowData &wd = windows[p_window];
	if (wd.minimized) {
		return wd.last_pos;
	}
	POINT point;
	point.x = 0;
	point.y = 0;
	ClientToScreen(wd.hWnd, &point);
	return Point2i(point.x, point.y) - _get_screens_origin();
}
Point2i DisplayServerWindows::window_get_position_with_decorations(WindowID p_window) const {