The NFL had Ballers, Dwayne Johnson’s five-season saga of unsportsmanlike conduct. High school football had Friday Night Lights — at its peak, one of the best shows on TV. But not since Craig T. Nelson’s Coach put down its whistle nearly three decades ago has the college game put serious points on the scripted-television board. Now, with the premiere of Hulu’s sweetly imbecilic Chad Powers, that long scoreless stretch looks set to end.