By Karen Freifeld, Kenneth Li and Moira Warburton Reuters (Reuters) -Huawei Chief Financial Officer Meng Wanzhou has reached an agreement with U.S. prosecutors to end the bank fraud case against her, officials said on Friday, a move that allows her to leave Canada, relieving a point of tension between China and the United States. The years-long extradition drama has been a central source of discord in increasingly rocky ties between Beijing and Washington, with Chinese officials signaling that the case needed to be dropped to help end a diplomatic stalemate between the world's top two powers. The deal also opens…