Support to create Argocd Applications CR within the namespace of the user (= selected within the template)

[cmoulliard]

Issue

We cannot create an Application CR in an namespace which is not the one operated by the Argocd CD controller/server
I see such error message if I try to create the application using the argocd console

Unable to create application: error while validating and normalizing app: 
error getting application's project: application 'my-quarkus-app-bootstrap-test' in namespace 'cmoullia' 
is not allowed to use project 'default'

Note: OpenShift GitOps operator has been installed cluster's scoped (=> all namespaces) BUT if I deploy an Application CR under another NS => demo, then nothing happens. I cannot even see the Application CR created within the console

[cmoulliard]

See documentation about how to support such a feature:

• https://argo-cd.readthedocs.io/en/stable/operator-manual/app-any-namespace/#overview
• https://github.com/argoproj-labs/argocd-operator/blob/master/docs/usage/apps-in-any-namespace.md

2 changes are needed.

A. Patch the ArgoCD CR to add the following parameter

sourceNamespaces: 
   - qshift
   - cmoulia
   - iocanel 

Note: As soon you will save the ArgoCD CR, the controller will rollout the ArgoCD Server

B. Create or update the default - AppProject CR to include .spec.sourceNamespaces: '*'