Prior to Saturday’s FA Cup final, Crystal Palace had gone the entirety of their 120-year existence without winning a major trophy. Ending that century-plus drought, and doing so by beating one of football’s modern dynasties in Manchester City, was cause for a long-overdue celebration in south London. That party extended across the Atlantic. During the goodbyes of the season finale of “Saturday Night Live,” Ego Nwodim was front and center,…