John Aniston, a longtime star of the soap opera “Days of Our Lives” and the father of actress Jennifer Aniston, died Friday at age 89, his daughter announced Monday. The Greek-born actor played Victor Kiriakis on more than 3,000 “Days of Our Lives” episodes spanning more than three decades, earning him a lifetime achievement honor at the Daytime Emmy Awards this year. A cause of death has not been released. “You were one of the most beautiful humans I ever knew,” Jennifer Aniston wrote in an Instagram tribute featuring photos of her with her dad over the years. “I am so grateful that you went …