Credit: Vincent Beaume When Pierre Audi, the director of Festival d’Aix-en-Provence, announced that Jonas Kaufmann and Ludovic Tézier would sing in a one-night-only concert version of “Otello,” tickets sold out in a minute. Even admittance for critics was scarce, and the festival gave seats out only when audience members turned in their tickets. Ill in London, Kaufmann canceled. This reviewer’s {…}