Clickhouse-benchmark will display percentage based

Why it matters

This feature improves the usability of the clickhouse-benchmark tool by providing a clear progress indicator in percentage terms when the user sets a maximum number of iterations, making it easier to track benchmark progress.

How to use it

When running clickhouse-benchmark, specify the maximum iterations using the appropriate option (e.g., --max-iterations). The benchmark progress will then be displayed as a percentage of these iterations completed.