### 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
return invertedIndexBytes + storedFieldBytes + docValuesBytes + pointsBytes + normsBytes + termVectorsBytes;
        }
        @Override
        public XContentBuilder toXContent(XContentBuilder builder, Params params) throws IOException {
            final long totalBytes = totalBytes();
            builder.field(TOTAL, new ByteSizeValue(totalBytes));
            builder.field(TOTAL_IN_BYTES, totalBytes);
            builder.startObject(INVERTED_INDEX);
            builder.field(TOTAL, new ByteSizeValue(invertedIndexBytes));
            builder.field(TOTAL_IN_BYTES, invertedIndexBytes);
            builder.endObject();
            builder.field(STORED_FIELDS, new ByteSizeValue(storedFieldBytes));
            builder.field(STORED_FIELDS_IN_BYTES, storedFieldBytes);
            builder.field(DOC_VALUES, new ByteSizeValue(docValuesBytes));
            builder.field(DOC_VALUES_IN_BYTES, docValuesBytes);
            builder.field(POINTS, new ByteSizeValue(pointsBytes));
            builder.field(POINTS_IN_BYTES, pointsBytes);
            builder.field(NORMS, new ByteSizeValue(normsBytes));
            builder.field(NORMS_IN_BYTES, normsBytes);
            builder.field(TERM_VECTORS, new ByteSizeValue(termVectorsBytes));
            builder.field(TERM_VECTORS_IN_BYTES, termVectorsBytes);
            return builder;
        }
        @Override
        public String toString() {
            return Strings.toString(this);
        }
    }
}