As President Clinton signed a financial aid package for the District of Columbia into law yesterday, several dozen community activists and clergy people intensified their protests that the plan undercut the city’s ability to govern itself. “Hey, hey, ho, ho, the out-of-control board has to go,” chanted about two dozen protesters who disrupted a meeting of the D.C. Financial Control Board shortly before the board announced the heads of the city’s nine largest agencies would not report to Mayor Marion Barry.