Rebecca Rubin Film and Media ReporterDavid Fincher is partnering with Netflix on “Voir,” a new documentary series of visual essays celebrating cinema.Netflix, or at least, the Twitter account dedicated to its movies, had film fans buzzing on Tuesday after tweeting: “Something special is coming tomorrow from David Fincher…”Alas, that “something special” is not a third season of “Mindhunter” or a sequel to “Mank,” the director’s Oscar-nominated Netflix drama about the screenwriter of “Citizen