By Trevor Hunnicutt WASHINGTON (Reuters) -U.S. President Joe Biden on Friday pardoned six people who have already served time for crimes, including five convicted of drug or alcohol-related offenses and a woman who killed her allegedly abusive husband nearly five decades ago. The latest pardons showed Biden nudging U.S. criminal justice policy away from the war-on-drugs ethos that he and other liberal lawmakers once championed. Now gearing up for a possible re-election bid in 2024, the Democratic president faces pressure to show progress on racial and criminal justice issues. The United States…