Service discovery and exposition

[siegfriedweber]

Let the user choose the exposed role-groups and provide a discovery ConfigMap

Part of #1

Documentation

https://docs.stackable.tech/home/nightly/opensearch/reference/discovery/

Release Notes

OpenSearch

A new service discovery mechanism has been introduced, enabling OpenSearch clients to be easily configured. Users can specify whether a role group should be exposed and choose the corresponding ListenerClass. The connection parameters for accessing the OpenSearch cluster are provided in a discovery ConfigMap. Detailed information can be found at https://docs.stackable.tech/home/stable/opensearch/reference/discovery/.

Tasks

• Decision: Service discovery and exposition #54
• feat: Service discovery and exposition #94