SUPPORT FOR "SOPRANOS": Fans Of HBO'S "The Sopranos" could turn the Avignon/New York Film Festival into a mob scene April 26 when Michael Sergio's movie "Under Hellgate Bridge" gets it's first airing. The flick features the hit TV series' Dominic Chianese and Vincent Pastore, along with Frank Vincent and soap star Michael Rodrick. "Sopranos" lead Tony Sirico will be there to support his castmates.