John Hopewell Chief International CorrespondentIn a large coup for its ambitions in Latin America and beyond, ViacomCBS International Studios (VIS) unveiled Wednesday an exclusive deal with Argentina’s Juan José Campanella, writer-director of the Academy Award winning “The Secret in Their Eyes.”The agreement follows smartly on production of a first season of “The Envoys” (“Los Enviados”), a six-part action thriller series starring Luis Gerardo Méndez, Miguel Ángel Silvestre, and Irene