A magnificent Central Park West penthouse in a building immortalized in “Ghostbusters” has hit the market for $42 million. The sellers are Cathy and Marc Lasry, the billionaire financier who reportedly lost an opportunity to be President Obama’s Ambassador to France after he had allegedly been tied to a Russian mob-run poker and money-laundering ring in 2013, as The Post reported at that time. That year, Lasry — who denied the claims — bought the penthouse duplex at 55 Central Park West, a