Cross-cluster replication

[djosephsen]

Heya! Thanks for this great project; quick question:

Currently, it doesn't seem to be possible to configure the operator with clickhouse replication partners outside the local k8s cluster. In other words, I'd like to be able to provide an external fqdn for my <replica> -> <host> 's. Am I missing something? Thanks in advance!

    <testsimple>
      <shard>
        <internal_replication>false</internal_replication>
        <replica>
            <host>some.external.fqdn.com</host>
            <port>9000</port>
        </replica>
      </shard>
    </testsimple>