Resolve "Convert ECK Operator to passthrough pattern"

General MR

Summary

• Convert eck-operator to passthrough pattern
• Also enables ServiceMonitor, which was previously not possible with the way the chart was configured

Relevant logs/screenshots

Linked Issue

issue

issue

Upgrade Notices

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

For example:

Previous Values:

image:
  repository: registry1.dso.mil/ironbank/elastic/eck-operator/eck-operator
  pullPolicy: Always
  tag: 3.0.0

config:
  logVerbosity: "3"

Current Values:

upstream:
  image:
    repository: registry1.dso.mil/ironbank/elastic/eck-operator/eck-operator
    pullPolicy: Always
    tag: 3.0.0

  config:
    logVerbosity: "3"

Please note, this change does not apply to Big Bang-added top-level keys, including: istio, networkPolicies, serviceMonitor, monitoring, openshift, license, upgradeCrds.