private List<String> formatFields(List<FieldInfo> fields) {
        List<String> formatFields = new ArrayList<>(fields.size());
        for (FieldInfo field : fields) {
            formatFields.add(field.format());
        }
        return formatFields;
    }
Format fields with '`'

@param fields The fields that need format
@return list of field after format
inlong-sort/sort-core/src/main/java/org/apache/inlong/sort/parser/impl/FlinkSqlParser.java