NEW YORK — The White House said Monday that the chairman of the Federal Deposit Insurance Corporation will step down, a departure that follows the release earlier this month of a damning report about the agency’s toxic workplace culture. The White House said Martin Gruenberg will step down once a successor is appointed and that President Joe Biden will name a replacement “soon.” The announcement came after the top Democrat on the Senate Banking Committee earlier Monday called for Gruenberg’s removal. Biden expects the FDIC “to reflect the values of decency and integrity and to protect the rights and dignity of all employees,” Deputy Press Secretary Sam Michel said in a statement. The FDIC is one of several U.S.