Resolve "Grafana passthrough conversion"

General MR

Summary

Grafana passthrough conversion

Umbrella Branch

grafana-passthrough

Relevant logs/screenshots

Clean Install

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Linked Issue

issue

Upgrade Notices

All upstream chart value overrides in ./chart/values.yaml will need to be shifted under the upstream key.

Previous Values:

image:
  registry: registry1.dso.mil
  repository: ironbank/big-bang/grafana/grafana-plugins
  tag: "12.1.0"
  ...

Current Values:

upstream:
  image:
    registry: registry1.dso.mil
    repository: ironbank/big-bang/grafana/grafana-plugins
    tag: "12.1.0"
  ...

Please note, this change does not apply to Big Bang-added top-level keys, including: istio, networkPolicies, serviceMonitor, monitoring, openshift, enterprise, alertmanager, sso and bbtests.