Harvey Weinstein is eyeing “The Artist,” a French, black-and-white, silent period piece, as an Oscar contender. He hosted a luncheon with Len Blavatnik on Saturday in Cannes on the Russian-born mogul’s yacht. Guests included Ron Burkle, Antonio Banderas, Melanie Griffith, Jane Fonda, Naomi Campbell and Sarah Jessica Parker. Weinstein is planning to release “The Artist” later this year, and sources say he’ll push it at Oscar time. The film has gotten a sunny reception on the Riviera.