Provide a sample configuration to use nuxeo Helm chart in production

Currently, the default values.yaml file deploys the strict minimum to have nuxeo running:

• No persistence for binaries
• H2
• Emebedded Elasticsearch
• Chronicle for WorkManager and streams
• ...

We could provide a sample "production-like" configuration to guide people wanting to use the Helm chart to make a "real" deployment of Nuxeo in Kubernetes:

• Enabling persistence for binaries
• Enabling MongoDB with a replicaSet
• Enabling Elasticsearch in cluster mode, with several replicas
• Enabling Kafka in clutser mode, with replicas