Lisa Turtle is back. Former “Saved by the Bell” star Lark Voorhies is speaking out in a rare interview following her schizoaffective thought disorder diagnosis, and her retreat from the spotlight. “For any young women, if they’re in this business…don’t give up,” Lark, 52, says in a new “Hollywood Demons” docuseries episode airing Monday. Lark Voorhies vanished from the spotlight for years after starring as Lisa Turtle in “Saved by the Bell” (pictured with Ed Alonzo as Max, Tiffani Thiessen as Kelly Kapowski, Mark-Paul Gosselaar as Zack Morris, Dennis Haskins as Mr. Richard Belding, Elizabeth Berkley as Jessie Spano, Dustin Diamond as Screech Powers, Mario Lopez as A.C. Slater).…