Al Pacino was spotted reuniting with Martin Bregman — producer of his hits “Scarface,” “Serpico,” “Dog Day Afternoon” and “Carlito’s Way” — on Tuesday. They dined at Primola with Harold Becker, director of Pacino’s “Sea of Love.” Nearby, power lit agent Esther Newberg met with prosector-turned-author Linda Fairstein about her 14th book, “Night Watch,” which debuts next month. Pacino was in town to be honored at the Public Theater’s Shakespeare in the Park 50th anniversary gala.