Add utility print-backup-info.py for parsing and printing backup metadata information

Why it matters

This utility helps users quickly inspect and understand the contents and metadata of ClickHouse backups without manually parsing the metadata files, improving backup management and verification.

How to use it

Run the print-backup-info.py script and provide the path to the backup metadata file as an argument. The script will parse the file and print backup information in a human-readable format.