Maybe it was a  misteak . The descendant of the brothers credited with creating the first Philly cheesesteak will make the renowned sandwiches at a Long Island pizzeria — while wearing head-to-toe Knicks gear — after losing a bet with the eatery’s co-owner. Frank Olivieri, proud owner of Philadelphia’s iconic Pat’s King of Steaks, will begrudgingly wear orange and blue while slinging sandwiches at Dario’s Pizza in West Hempstead after the Knicks annihilated the 76ers 144-114 on Sunday. Frank Olivieri owns Pat’s King of Steaks in Philadelphia. The Washington Post via Getty Images Olivieri had instigated a friendly wager with the pizza parlor’s co-owner, Louis Cretella. The pair bet on which teams would win, Olivieri siding with the 76ers and Cretella with the Knicks — and the loser would have to travel to the other’s restaurant and cook for a day in the winning team’s gear. “[Olivieri] wanted to make a wager on game three. I said, let’s bet the whole series,” Cretella told The Post.…