LVMH CEO Bernard Arnault built his luxury conglomerate on heritage brands and centuries-old notions of craftsmanship. But the 77-year-old mogul is now embracing A.I., like many of his peers. Speaking at this year’s VivaTech conference in Paris, Arnault said he personally experiments with A.I.-assisted product design on a regular basis. “Every week, we have a design session with A.I.,” he said during an onstage conversation with VivaTech co-found…