By Svea Herbst-Bayliss NEW YORK, Dec 29 (Reuters) - International law firm Cleary Gottlieb Steen & Hamilton has hired an industry veteran to lead its shareholder ​activism defense practice as more law firms build out capabilities to ‌protect clients facing corporate agitators. Sebastian Alsheimer is moving to Cleary as a partner from Wilson Sonsini ‌Goodrich & Rosati, where he was also a partner, two sources familiar with the move said. He will be based in New York and will start in January. Cleary and ...