LAS VEGAS — Boxing fans across the country and their lawyers are calling the hyped-up fight between Manny Pacquiao and Floyd Mayweather Jr. a fraud and want their money back — and then some.At least 32 U.S. lawsuits seeking class-action status allege Pacquiao should have disclosed a shoulder injury to fans before the fight, which Mayweather won in a unanimous decision after 12 rounds that most fans thought didn’t live up to the hype.Fight of the century? More like fraud of the century, the lawsuits …