SceneManagement | Create a proper SceneTemplate from the sceneTemplate

Summary

Currently we can manually create a copy of our sceneTemplate if we want to create a new scene. Integrate that into the "correct" scene template approach by making a real Scene Template from it.

Problem or need

Minor convinience feature, as you could simply copy & paste the scene. But this allows us to setup a template pipeline.

Proposed solution

Make a Scene Template out of the sceneTemplate ;)

Alternatives considered

Keeping the manual approach, but seeing that setting this up is fairly easy, why not?

Additional context

Add any other context or screenshots about the feature request here.