ATLANTA — Georgia Democratic gubernatorial candidate Stacey Abrams filed a federal lawsuit Monday seeking court approval to use a law passed in part to give Republican Gov. Brian Kemp a massive fundraising advantage in his reelection bid this year. The challenge asks the court to require state officials to let her use the leadership committees that were approved last year by the Republican-controlled General Assembly. The lawsuit says Abrams’ campaign has already created such a committee, One Georgia, and it has been raising money since shortly after she filed to run against Kemp earlier this …