[Feature][Connect-v2][Clickhouse] Support a custom clickhouse config for source side

[loustler]

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Description

The source connector of Clickhouse throws a ReadTimedOut exception, so I need a custom config for clickhouse to resolve that.
In my opinion, we are supposed to support a custom config for Clickhouse source connector same with the sink connector of Clickhouse, because we already support a custom config for Clickhouse on the sink connector side.

https://seatunnel.apache.org/docs/2.3.5/connector-v2/sink/Clickhouse#clickhouse-sink-config

Usage Scenario

Usage scenario same with the sink connector

source {
  Clickhouse {
    host = "localhost:8123"
    database = "default"
    table = "fake_all"
    username = "xxxxx"
    password = "xxxxx"
    clickhouse.config = {
      socket_timeout = "30000"
    }
  }
}

Related issues

No response

Are you willing to submit a PR?

• Yes I am willing to submit a PR!

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