private static boolean matchMixedFileFormat(Matcher fileNameMatcher) {
    return fileNameMatcher.matches() && validFileType(fileNameMatcher.group(2));
  }
Parse transaction id of change file.

@param path path
@return transactionId, return 0 if path is not file format of mixed-format tables.
amoro-format-iceberg/src/main/java/org/apache/amoro/data/FileNameRules.java