“Jonathan Miller is in a state of disgruntlement. Despite his congeniality and his mischievous good humor, things are getting him down.” At 72, he says New York, where his City Opera production of “The Elixir of Love” opens Saturday, will soon be crossed off the list of places where he’s willing to work. ” ‘I even have to pay my own hotel. It took three hours to get the papers I need to work here. And another seven hours flying here. And what do I get in return? The New York Times.’ “