Photo: AppleTV/Copyrighted This year’s Emmys aren’t till September, but you can already mark down a slot for David E. Kelley’s OnlyFans comedy, Margo’s Got Money Troubles — based on the novel by Rufi Thorpe — which just had the world premiere of its first three episodes to hoots and cheers as the opening-night TV offering at SXSW. (The eight-episode series hits Apple TV on April 15.) This is Elle Fanning as you’ve never seen her before: raw, funny, and often topless (but not always in a sexual