Every episode of How To With John Wilson, which kicks off its third and final season July 28 on HBO, opens with a key, if unassuming, greeting: “Hey, New York.” Wilson, who narrates every episode of his nonfiction series culled from hours and hours of footage shot (mostly) in the Big Apple, makes no attempt to hide the fact that he’s long hoped to have a conversation with his fellow city dwellers. His Emmy-nominated docuseries, in fact, couldn’t exist without them. Not just as interlocutors but