Support JWT Authentication in ClickHouse Client for Cloud

Why it matters

This feature addresses the need for a secure and standardized authentication method by allowing users to authenticate using JSON Web Tokens (JWT). It enhances security and simplifies integration in environments where JWT is used for identity and access management.

How to use it

Users can enable JWT authentication in clickhouse-client by providing a valid JWT token during the client connection process, applicable only within ClickHouse Cloud environments.