Danny Boyle’s “Yesterday” is a delight almost to the end. How can it not be? First of all, perfect pitch by both Himesh Patel (Jack) and the too-lovely-for-words Lily James (Ellie). Patel is Jack Malik, a store employee who, through a blackout on earth and being hit by a bus, wakes up in an alternate world where he is the one and only person who knows the Beatles. A third-rate musician who kind of strums a guitar to accompany