PARIS - On Thursday it was announced that Canal Plus, a France-based media conglomerate that began in 1984 as this country’s first privately-owned television, would be definitively pulling out of the Cannes Festival as its main sponsors. Cannes, and Canal as it’s known more simply, have been in a collab for the last 28 years, the latter beaming the opening and closing ceremonies into hundreds of thousands of homes, its familiar logo omnipresent