Sacha Baron Cohen is still invited to the Oscars — but General Aladeen has been exiled. Cohen must ditch plans to march on Oscar’s red carpet dressed as the lead of his upcoming flick, “The Dictator,” a rep for the show said last night. “We don’t feel it’s appropriate to use our Oscar red carpet as a venue for a movie promotional stunt,” the rep said. The actor’s publicist could not be reached for comment.