### Description

We now support storing KNN vectors as part of our indexed data.  These vectors should be included in the disk usage API.
server/src/main/java/org/elasticsearch/action/admin/indices/diskusage/IndexDiskUsageStats.java
private long invertedIndexBytes;
        private long storedFieldBytes;
        private long docValuesBytes;
        private long pointsBytes;
        private long normsBytes;
        private long termVectorsBytes;
        private PerFieldDiskUsage() {
        }
        private PerFieldDiskUsage(StreamInput in) throws IOException {
            invertedIndexBytes = in.readVLong();
            storedFieldBytes = in.readVLong();
            docValuesBytes = in.readVLong();
            pointsBytes = in.readVLong();
            normsBytes = in.readVLong();
            termVectorsBytes = in.readVLong();
        }
        @Override
        public void writeTo(StreamOutput out) throws IOException {
            out.writeVLong(invertedIndexBytes);
            out.writeVLong(storedFieldBytes);
            out.writeVLong(docValuesBytes);
            out.writeVLong(pointsBytes);