Nina Gold tells IndieWire about how an inspired casting choice can be 17 years in the making. Noah Baumbach’s “ Jay Kelly ” is about a movie star, which is to say it’s about how hard it is to be a person — even when you’re George Clooney. The film’s focus puts a lot of emotional and frankly IMDB-rated baggage on the choices of the people who swirl around Jay’s orbit, from his publicist (Laura Dern) and his long-suffering agent (Adam Sandler) to an old mentor (Jim Broadbent) and a former rival