ALBERTO VILAR Fraud rap for money whiz. Alberto Vilar, a hotshot millionaire money manager and the Metropolitan Opera's largest benefactor, was hauled before a federal judge yesterday on charges he stole $5 million from a client — and used part of the money to make a donation to his alma mater. Vilar, 64, was nabbed by US postal inspectors Thursday after stepping off a plane at Newark Airport. His business partner, Gary Tanaka, 62, was also arrested as he relaxed at an East Side hotel. Postal cops had been alerted to Vilar's alleged crimes by the client, who told...