Command line "--password" parameter in clickhouse-client can now be specified only once

Why it matters

This change ensures that the --password parameter is accepted a single time, preventing ambiguity or conflicts that could arise from multiple specifications of the password. It improves security and command-line interface consistency for users.

How to use it

When launching clickhouse-client, specify the password using the --password parameter only once, for example:

clickhouse-client --password="your_password"