Hollywood sex, sin and sparkle will be much in evidence next month at the 2023 Cannes Film Festival. The French Riviera event, running May 16 to 27, will present the world premiere of “The Idol,” a controversial upcoming HBO TV series billed as “the sleaziest love story in all of Hollywood.” It’s cocreated by and co-stars Abel Tesfaye, the Toronto musician better known as The Weeknd. Tesfaye plays an L.A. club owner and secret cult leader who exerts sexual and career control over a rising pop star played by Lily-Rose Depp. She’s the daughter of actor Johnny Depp, who stars...