The FDNY is expected to shell out a record $200 million in overtime this year to its uniformed personnel because a bruising federal court fight has blocked the hiring of new firefighters, The Post has learned. Records show that OT payments to firefighters and officers, which dropped to a four-year low of $128 million in fiscal 2009, spiked after Brooklyn federal Judge Nicholas Garaufis ruled that the 2007 firefighter exam was biased against minorities and hiring came to an abrupt halt.