Add support for off-cluster postgres, kafka and zookeeper to helm chart

[creatorrr]

Todo:

• [x] Merge development branch changes
• [ ] Parameterize resources and add a locations section to helm chart values.yaml file
• [ ] Split on-cluster and off-cluster configuration sections for each resource
• [ ] Make test pass
• [ ] Add documentation

[creatorrr]

cc/ @sitnik