### 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
getOrAdd(fieldName).invertedIndexBytes += bytes;
    }
    public void addStoredField(String fieldName, long bytes) {
        checkByteSize(bytes);
        getOrAdd(fieldName).storedFieldBytes += bytes;
    }
    public void addDocValues(String fieldName, long bytes) {
        checkByteSize(bytes);
        getOrAdd(fieldName).docValuesBytes += bytes;
    }
    public void addPoints(String fieldName, long bytes) {
        checkByteSize(bytes);
        getOrAdd(fieldName).pointsBytes += bytes;
    }
    public void addNorms(String fieldName, long bytes) {
        checkByteSize(bytes);
        getOrAdd(fieldName).normsBytes += bytes;
    }
    public void addTermVectors(String fieldName, long bytes) {
        checkByteSize(bytes);
        getOrAdd(fieldName).termVectorsBytes += bytes;
    }
    public IndexDiskUsageStats add(IndexDiskUsageStats other) {
        other.fields.forEach((k, v) -> getOrAdd(k).add(v));
        this.indexSizeInBytes += other.indexSizeInBytes;
        return this;
    }
    @Override
    public XContentBuilder toXContent(XContentBuilder builder, Params params) throws IOException {
        final PerFieldDiskUsage total = total();