Staffers at Olivia Nuzzi’s new employer Vanity Fair are reportedly “shocked” at allegations that she slept with onetime presidential candidate Mark Sanford — raising fresh questions over whether parent company Condé Nast erred in hiring the scandal-tainted journo. The Status newsletter reported Wednesday that members of the rank-and-file at the glitzy mag wonder whether there will be consequences for Nuzzi after her jilted ex, former Politico staffer Ryan Lizza, accused her of yet another