Director Nick Cassavetes shared his mom’s diagnosis in an interview with Entertainment Weekly: “We lived it, she acted it, and now it’s on us.” Actor Gena Rowlands, an Emmy and Golden Globe winner best known to modern audiences for her heart-wrenching performance in “The Notebook,” has Alzheimer’s disease. Director and actor Nick Cassavetes, who is Rowlands’ son, confirmed his 94-year-old …