### 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/IndexDiskUsageAnalyzer.java
final IndexInput in;
        final BytesReadTracker bytesReadTracker;
        final long fileOffset;
        TrackingReadBytesIndexInput(IndexInput in, long fileOffset, BytesReadTracker bytesReadTracker) {
            super(in.toString());
            this.in = in;
            this.fileOffset = fileOffset;
            this.bytesReadTracker = bytesReadTracker;
        }
        @Override
        public void close() throws IOException {
            in.close();
        }
        @Override
        public long getFilePointer() {
            return in.getFilePointer();
        }
        @Override
        public void seek(long pos) throws IOException {
            in.seek(pos);
        }