Added clickhouse-obfuscator Utility for Data Obfuscation

Why it matters

The utility helps obfuscate sensitive data, enabling safe publishing and sharing of datasets, such as those used in performance tests, without exposing confidential information.

How to use it

Use the clickhouse-obfuscator command-line tool to process and obfuscate your data before publishing. This ensures that sensitive information is masked while retaining the dataset structure for testing or demonstration purposes.