Audi is developing a new electric crossover positioned between the midsize Q8 E-Tron and compact Q4 E-Tron. It will go by the name Q6 E-Tron, and prototypes have been out and about for more than a year. Our latest spy shots show a prototype for a coupe-like version to be called the Q6 Sportback E-Tron. It will sit together with coupe-like versions…