WASHINGTON — House Speaker Mike Johnson called on the Big Apple Thursday to scrap its “sanctuary” city status if it wants federal money to help house thousands of migrants pouring into the city. In an exclusive and wide-ranging interview with The Post, the Louisiana Republican’s first with a major publication since seizing the gavel, Johnson said he was “certain” his fellow GOP lawmakers will stipulate a rollback of policies that restrict local police cooperation with federal immigration officials to deport migrants accused of serious crimes. “I’m certain that will be one of our proposals, and it should,” the 51-year-old said....