In more than 15 years of filmmaking, Jason Reitman says he’s never been asnervous about a premiere than he is with this week’s release of “Ghostbusters: Afterlife.””I want to make my father proud and I want to do well by my family legacy, and this is the only movie that I’ve ever made that has never belonged to me,” the Montreal-born filmmaker behind the Oscar-nominated dramedies “Juno” and “Up in the Air” said in a recent phone interview.