By Herbert Lash NEW YORK (Reuters) – The dollar rose to a three-week on Wednesday after the Federal Reserve signaled that it is likely to raise U.S. interest rates in March as expected and later launch a significant reduction in its asset holdings. The combined moves will complete a pivot away from the loose U.S. monetary policy that has defined the pandemic era and toward a more urgent fight against inflation. The Fed’s statement at the end of its two-day policy meeting left questions about the timing of rate hikes and reducing the U.S. central bank’s almost $9 trillion balance sheet, but mar…