### 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)
EnumSizeData *data = (EnumSizeData *)dwData;
	if (data->count == data->screen) {
		data->size.x = lprcMonitor->right - lprcMonitor->left;
		data->size.y = lprcMonitor->bottom - lprcMonitor->top;
	}
	data->count++;
	return TRUE;
}
Size2i DisplayServerWindows::screen_get_size(int p_screen) const {