Cesar-winning French producer Sylvie Pialat is in Cannes with one of the most eclectic slates on the Croisette, ranging from an alpine revenge thriller from Argentine auteur Pablo Fendrik, a geopolitical drama about Augusto Pinochet starring Sebastian Stan and Ana de Armas , and the first animated feature from Céline Devaux.   Led by Pialat and Benoit Quainon, Les Films du Worso is developing “Black Glacier,” directed by Fendrik and starring Samuel Kircher and Andranic Manet. Produced alongside