### 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
try (DirectoryReader directoryReader = DirectoryReader.open(commit)) {
            directory.resetBytesRead();
            for (LeafReaderContext leaf : directoryReader.leaves()) {
                cancellationChecker.checkForCancellation();
                final SegmentReader reader = Lucene.segmentReader(leaf.reader());
                startTimeInNanos = System.nanoTime();
                analyzeInvertedIndex(reader, stats);
                executionTime.invertedIndexTimeInNanos += System.nanoTime() - startTimeInNanos;
                startTimeInNanos = System.nanoTime();
                analyzeStoredFields(reader, stats);
                executionTime.storedFieldsTimeInNanos += System.nanoTime() - startTimeInNanos;
                startTimeInNanos = System.nanoTime();
                analyzeDocValues(reader, stats);
                executionTime.docValuesTimeInNanos += System.nanoTime() - startTimeInNanos;
                startTimeInNanos = System.nanoTime();
                analyzePoints(reader, stats);
                executionTime.pointsTimeInNanos += System.nanoTime() - startTimeInNanos;
                startTimeInNanos = System.nanoTime();
                analyzeNorms(reader, stats);
                executionTime.normsTimeInNanos += System.nanoTime() - startTimeInNanos;
                startTimeInNanos = System.nanoTime();
                analyzeTermVectors(reader, stats);
                executionTime.termVectorsTimeInNanos += System.nanoTime() - startTimeInNanos;
            }
        }
        logger.debug("analyzing the disk usage took {} stats: {}", executionTime, stats);
    }
    void analyzeStoredFields(SegmentReader reader, IndexDiskUsageStats stats) throws IOException {
        final StoredFieldsReader storedFieldsReader = reader.getFieldsReader().getMergeInstance();
        directory.resetBytesRead();