By Andrew Holleran Before Camille Kostek was a Sports Illustrated Swimsuit cover model, she was an NFL cheerleader. Kostek, who now dates former Patriots star Rob Gronkowski, was a New England cheerleader. Ahead of NFL kickoff on Sunday, Kostek threw it back to her cheerleading days. “”Verified Fun fact: my first NFL game was on the sidelines as a @patriotscheerleaders 🏈 💃🏼 Before I was watching the games in the stands I was cheering and dancing in the end zones and #NeverNotDancing from the sidelines. It was a goal of mine to make a professional dance team after growing up dancing from 3-18 y…