Timothée Chalamet will once again have to choose between his partner, Kylie Jenner, and his beloved New York Knicks on Monday as the team’s first game of their second-round playoffs series clashes with the Met Gala. Last year, Jenner, 28, walked the storied Fifth Avenue steps solo as Chalamet, 30, stayed home to watch the Knicks play the Boston Celtics in Game 1 of their series. In a subsequent podcast appearance, the Marty Supreme star said he was too “locked in” with the Knicks to attend fashion’s biggest night with his partner of three years. "That Knicks run last year, I think that was the most fun period of my life. Those four months, I’m not even kidding. Just the Garden being electric,” he explained. On Monday, the Knicks will take on the Philadelphia 76ers in Game 1 of the Eastern Conference semifinals at Madison Square Garden — just a few miles downtown from The Metropolitan Museum of Art.…