Chicago Blackhawks general manager and president of hockey operations Stan Bowman resigned Tuesday after an investigation commissioned by the team found he was among a group of leaders who failed to respond promptly to allegations that an assistant coach sexually assaulted a player in 2010.The results of the independent review by Jenner & Block were handed over to the Blackhawks on Monday, and team CEO Danny Wirtz said the report “is both disturbing and difficult to read.”The investigation was commissioned …