BATH — After a stormy chapter in labor relations, the leader of Bath Iron Works aims to collaborate more with workers as the shipbuilder completes production of a stealthy class of destroyers and competes for an entirely new class of smaller warships. Dirk Lesko said after wrapping up his first year as president that he maintains an “abiding faith” in the workforce to help solve problems to keep the General Dynamics subsidiary competitive as the president’s goal of expanding the Navy fleet’s size is met with difficult fiscal realities in Washington. “None of us is as smart as all of us.