Roberto Aronica will sing the final performance of Bizet’s “Carmen” on Feb. 18. He will replace Marcelo Álvarez, who is ill. Aronica stepped in for the previous Feb 7, 11 and 15 performances after Rafael Davila filled in for two performances including the opening night. Álvarez sang three performances of the run but opted out of finishing it. Aronica made his Met debut as Alfredo in {…}