NEW YORK — All eyes were on Everson Pereira on Tuesday, but another 22-yearold spoiled the outfielder’s major league debut. With the game knotted at one in the eighth, the Nationals’ CJ Abrams lined a Tommy Kahnle changeup off the right field foul pole. The home run paved the way for a 2-1 Washington win — and the Yankees’ ninth straight loss. The Yankees had hoped that the promotions of…