Instead of training their smartphones on Jacob Elordi or one of the K-pop stars converging on the European men’s shows, guests at the Ralph Lauren Purple Label presentation on Friday shooed people away from the modified 1952 Jaguar XK120 parked in the entrance foyer of Lauren’s Milan showroom. They all wanted a clear shot of its gleaming, aerodynamic curves and the futuristic Perspex bubble sheltering the pilot…