From Paris to Mexico, Leonora Carrington’s extraordinary life is retold with intelligence and restraint, though not quite enough imaginationAt the age of 20, debutante Leonora Carrington ran away from London to be an artist in Paris, living with the surrealist Max Ernst, who was married and more than twice her age. But you won’t notice the uncomfortable age gap in this biopic, in which Carrington is played by Olivia Vinall, who is in her late 30…