Document how to access application logs from container logs using EFK

For on-prem customers, document how to forward all existing application logs to the standard OCP container/pod logs, so they can be queried using Elasticsearch, Fluentd, and Kibana (EFK) logging tools. Users want the logs all in one place.

This information most likely be added to the Operating 3scale guide

For more details, see:

• THREESCALE-2593
• Deploying EFK on OCP 3.11
• Deploying EFK on OCP 4.1