On paper, Francis Lee’s Ammonite seems like the kind of film for those who enjoyed last year’s exquisite Portrait of a Lady on Fire. It’s about the love affair between two women who can’t live their romance openly but feel a burning passion that can only end with bittersweet melancholy. And yet whereas Portrait of a Lady on Fire is one of the best love stories in cinema, Ammonite is a cold, dry picture that goes through the motions without ever pushing deeper into its characters’ psyches or their relationship. It’s a film that manages …