FMovieSceneEvaluationTemplateSerialNumber::FMovieSceneEvaluationTemplateSerialNumber

Copy/move semantics only ever initialize to zero, or passthrough, to ensure that [FMovieSceneEvaluationTemplate::TemplateSerialNumber](API\Runtime\MovieScene\Evaluation\FMovieSceneEvaluationTemplate\TemplateSerialNu-) cannot ever move backwards.