### Godot version

4.0

### System information

Windows 11

### Issue description

So on my monitor with 2560x1440 resolution retrieved by the `DisplayServer.get_window_size` method shows 2562x1442, which I think is incorrect. A similar result returned by `get_viewport().size`. But it's become correct if the `Resizable` property is turned on.

![image](https://user-images.githubusercontent.com/3036176/212492776-5c09b12e-d25a-4951-8392-54f5a5e3bece.png)


### Steps to reproduce

Create the project, add a label to observe the resolution text, set the full-screen mode in the project settings, toggle off the `Resizable` property, and run the project.

### Minimal reproduction project

[TestResolution.zip](https://github.com/godotengine/godot/files/10418682/TestResolution.zip)

_THREAD_SAFE_METHOD_
#if defined(VULKAN_ENABLED)
	if (context_vulkan) {
		context_vulkan->set_vsync_mode(p_window, p_vsync_mode);
	}
#endif
#if defined(GLES3_ENABLED)
	if (gl_manager) {
		gl_manager->set_use_vsync(p_window, p_vsync_mode != DisplayServer::VSYNC_DISABLED);
	}
#endif
}
DisplayServer::VSyncMode DisplayServerWindows::window_get_vsync_mode(WindowID p_window) const {
	_THREAD_SAFE_METHOD_
#if defined(VULKAN_ENABLED)
	if (context_vulkan) {
		return context_vulkan->get_vsync_mode(p_window);
	}
#endif
#if defined(GLES3_ENABLED)
	if (gl_manager) {
		return gl_manager->is_using_vsync(p_window) ? DisplayServer::VSYNC_ENABLED : DisplayServer::VSYNC_DISABLED;
	}
#endif
	return DisplayServer::VSYNC_ENABLED;
}
void DisplayServerWindows::set_context(Context p_context) {