By Andrea Shalal and David Lawder WASHINGTON (Reuters) -Senior U.S. officials fanned out this week to press world leaders to continue putting pressure on Moscow or join the campaign of sanctions and other measures as the war in Ukraine enters its fifth week, and the initial economic shock to Russia seems to be ebbing. Deputy Treasury Secretary Wally Adeyemo met with senior officials in London, Brussels and Paris, and will finish the week in Berlin; the deputy national security adviser for international economics, Daleep Singh, pressed Indian officials in New Delhi, and Secretary of State Anton…