Description:

Add a subscription env to disable creation of the default operator

Design doc and discussion: https://docs.google.com/document/d/15D0_zHDC7DOjFhcgv9ARIyRpOQ8BT2tlU2I-KdVeGCA/edit#

Enabling additional support for the GitOps OpenShift console UI will be handled by a subsequent story/epic.

Acceptance Criteria:

• The operator Subscription should support an environment variable which, when set, prevents the creation of the default ArgoCD instance in gitops-operator namespace
• Environment variable should be documented for public users
• ArgoCD monitoring (via ServiceMonitors) should continue to work for ArgoCD instances that the user creates.
• When running in this mode, the UI will not work for this Argo CD instance (similar to user-scoped ArgoCD instances installed in other namespaces); verify that this doesn't significantly affect the openshift-console.