The meaty, multi-day event marks its 35th year, making it one of the region’s longest-running food festivals and among the oldest competitive rib fests in the country. While the jury is still out on Pittsburgh becoming a barbecue destination, for one weekend each year, the city nabs this particular spotlight. The Kickoff and Rib Festival has returned to Acrisure Stadium through Labor Day, bringing a dozen nationally recognized rib vendors, free concerts, and football to the North Shore…