Ross, a veteran insult comedian it is best known these days as the Friars Club's Roastmaster General for his emphatically blue-hued contributions to the made-for-TV skewerings of such celebrities as Pamela Anderson, William Shatner, Bob Saget, David Hasselhoff and Joan Rivers, will be bringing his no-prisoners style of comedy to the Burton Cummings Theatre this Friday at 7:30 p.m. (tickets $43.7