For crisp tension or thematic clarity, nothing in “The Balconettes” quite outdoes the nearly self-contained, minutes-long short that opens actor-director Noémie Merlant’s frenzied, heatstruck genre mashup. On a 115-degree summer afternoon in a wilting, AC-challenged Marseilles apartment block, a put-upon middle-aged wife passes out on her balcony. Roused with a splash of water by her […]