Alan Cumming didn’t know much about the infamous Tom Sandoval before the latter joined the Season 3 cast of The Traitors. The competition show host recently sat down for an interview where he dished on his experience working with the Vanderpump Rules star. “Are you familiar with Tom Sandoval and the Scandoval now?” the interviewer queried. “I knew he was a big cheater. And some hilarious things happened, he made some gaffes. He made some mistakes that put him in much hotter water,” The Good Wife alum stated of the reality TV personality, who was unfaithful to his ex-girlfriend Ariana Madix wit…