1147 clowder 2 helm chart clean up

[longshuicy]

This PR addresses below:

• Allow overwrite with existing secrets to different compoents e.g. backend, geoserver
• Update default values so that:
  • Allow ingress to be turned off e.g. rabbitmq, minio
  • Turn off geoserver by default
• Fix duplicated hostanme in TLS
• Use fullname instead of name in various places
• Allow overwrite of the env variables on backend and frontend

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To test:

2. Backward compatibility with clowder2 demo instance

• switch context kubectl config use-context software-dev
• acquire the "chen-clowder2-software-dev.yaml" from the box folder https://uofi.app.box.com/folder/205332339557
• place it under deployment/charts/clowder2 folder
• run helm diff upgrade --namespace clowder2 clowder2 . --values chen-clowder2-software-dev.yaml this should have minimum diffs

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!!! Already deployed so don't repeat:

1. Work with littlebeats yaml file
   see this PR: https://git.ncsa.illinois.edu/kubernetes/clusters/clowder/-/merge_requests/5

• set up connection to "clowder".
• switch context kubectl config use-context clowder
• place the "littlebeats.yaml" in the deployment/charts/clowder2 folder
• run helm upgrade --namespace littlebeats littlebeats . --values littlebeats.yaml --allow-unreleased this should

[longshuicy]

Merge to release branch for now. If found any new issue, will fix it against release.