The sense of movement in ''Woman With Her Throat Cut'' has something to do with metamorphosis. Part of what is being transformed is the history of art. This is definitely not the pastoral, refined, reclining woman of Titian, Giorgione, David or Ingres. It is the reclining woman after Manet's ''Olympia,'' the prostitute offering herself with a sassiness new to art. In the Giacometti, the invitation is still being tended and it has already been taken. Either way, it means danger.