By Jeff Mason and Jarrett Renshaw WASHINGTON (Reuters) -The U.S. government will run out of supplies of COVID-19 treatments known as monoclonal antibodies as soon as late May and will have to scale back plans to get more unless Congress provides more funding, the White House said on Tuesday. Raising the alarm about depleted funding for the U.S. pandemic response, the White House said the government also would not have enough money to provide additional COVID-19 booster shots or variant-specific vaccines without a new injection of cash. The White House has requested $22.5 billion in immediate e…