Added Redis requirepass authorization for dictionary source

Why it matters

This feature enables users to connect to password-protected Redis instances when using Redis as a dictionary source in ClickHouse. It improves security by allowing connections to authenticated Redis servers, thus supporting environments where Redis access is restricted with a password.

How to use it

When configuring a Redis dictionary source, specify the Redis password using the new requirepass parameter in the dictionary configuration. This allows ClickHouse to authenticate with the Redis server by providing the required password.