SALT LAKE CITY — Ten years after banning the use of firing squads in state executions, Utah lawmakers on Wednesday endorsed a proposal to allow the practice again to avoid problems with lethal-injection drugs. The proposal from Republican Rep. Paul Ray of Clearfield would call for a firing squad if the state cannot obtain the lethal injection drugs 30 days before the scheduled execution. Utah dropped firing squads out of concern about the media attention, but Ray said it’s the most humane way to execute …