PARIS — Cadillac has struggled for decades to gain a lasting foothold in Europe. To change that, the U.S. premium brand is launching a lineup of electric vehicles that benefit from parent General Motors’ $35 billion investment in advanced technology. Cadillac has launched sales in Germany, France, Switzerland and Sweden. Leading the way is the Lyriq, which had 167 sales through October, ranking it as the No. 12 full-electric model out of 14 in the premium large SUV segment. The Optiq will be Cadillac’s next launch in Europe.