### 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/test/java/org/elasticsearch/action/admin/indices/diskusage/IndexDiskUsageAnalyzerTests.java
protected static Directory createNewDirectory() {
        final Directory dir = LuceneTestCase.newDirectory();
        if (randomBoolean()) {
            return new FilterDirectory(dir) {
                @Override
                public void close() throws IOException {
                    try {
                        analyzeDiskUsageAfterDeleteRandomDocuments(dir);
                    } finally {
                        super.close();
                    }
                }
            };
        } else {
            return dir;
        }
    }
    public void testStoredFields() throws Exception {
        try (Directory dir = createNewDirectory()) {
            final CodecMode codec = randomFrom(CodecMode.values());
            indexRandomly(dir, codec, between(100, 1000), doc -> {
                final double ratio = randomDouble();
                if (ratio <= 0.33) {