v.22.4Improvement

Remove --testmode option from clickhouse-client and enable unconditionally

Official CH changelog text
Remove --testmode option for clickhouse-client, enable it unconditionally. #35354 (Kseniia Sumarokova).
The --testmode option for clickhouse-client has been removed and is now enabled unconditionally by default.

Why it matters

This change simplifies the usage of clickhouse-client by always enabling test mode, eliminating the need for users to specify the --testmode option explicitly. It ensures consistent behavior across all client executions and reduces user configuration errors.

How to use it

Users do not need to enable anything manually; test mode is now active automatically whenever clickhouse-client is used.

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