### 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
private final Map<String, FieldInfo> dvSuffixes = new HashMap<>();
        private final Map<String, FieldInfo> postingsSuffixes = new HashMap<>();
        FieldLookup(FieldInfos fieldInfos) {
            for (FieldInfo field : fieldInfos) {
                Map<String, String> attributes = field.attributes();
                if (attributes != null) {
                    String postingsSuffix = attributes.get(PerFieldPostingsFormat.PER_FIELD_SUFFIX_KEY);
                    if (postingsSuffix != null) {
                        postingsSuffixes.put(postingsSuffix, field);
                    }
                    String dvSuffix = attributes.get(PerFieldDocValuesFormat.PER_FIELD_SUFFIX_KEY);
                    if (dvSuffix != null) {
                        dvSuffixes.put(dvSuffix, field);
                    }
                }
            }
        }
        /**
         * Returns the codec suffix from this file name, or null if there is no suffix.
         */
        private static String parseSuffix(String filename) {
            if (filename.startsWith("_") == false) {
                return null;
            }
            String[] parts = IndexFileNames.stripExtension(filename).substring(1).split("_");