BOULDER — Gerry DiNardo doesn’t know Deion Sanders from Adam Bledsoe. But he knows this: If ex-CU Buffs coach Bill McCartney had his mitts on the transfer portal four decades ago, he would’ve used that bad boy the way Rembrandt used a brush. “Bill was a master of trying to bring teams together,” DiNardo, the offensive coordinator of the Buffs’ national championship team in 1990 and an analyst with the Big Ten Network, told The Post recently.