Jersey City has said bon voyage to bringing a French art museum to the city — after wasting $20 million in taxpayers’ cash. The Pompidou x Jersey City project spent the vast amount without laying a single brick or hanging one piece of art, The Post can reveal. “Elevator consultants, lighting consultants, sound consultants, food consultant, three roofing consultants, a French lawyer from Paris; all related to a building site that was abandoned by the city after state funding was pulled. Oui oui ,