©Courtesy of GKIDS Honestly, animation was probably the only way to adapt Amélie Nothomb’s otherwise “unadaptable,” “biographical” novella. Describing the world as she supposedly saw it as a three-year-old toddler, her book-club-friendly The Character of Rain reads something like Look Who’s Talking in the style of Terrence Malick. Regardless, the title rugrat character has a…