WASHINGTON — President Barack Obama's long-stalled nominee for attorney general, federal prosecutor Loretta Lynch, is on her way to a confirmation vote after senators extricated themselves Tuesday from a partisan dispute over abortion that had stood in her way.An agreement announced by Senate leaders allowed both Republicans and Democrats to save face on a once-uncontroversial bill to help sex-trafficking victims that had turned into a litmus test on abortion.Although that issue was not connected to Lynch, Senate …