Manhattan’s estimable purveyor of art movies, old movies, and odd movies, Film Forum, will be welcoming the new year with a cautionary program — that is to say, an array of pictures about artificial intelligence. There have been a bounty of films dedicated to the subject, and were the selections in the series not already firmed up, “A.I. From Metropolis To Ex Machina … or, How the Movies Have Been Warning Us for Nearly 100 Years” could also include Nick Park and Merlin Crossingham’s “Wallace and Gromit: Vengeance Most Fowl.”