Incorrect phase reconciliation for Argo CD instances

Description of problem:

Argo CD instance's phase (under `status.phase`) is set to available even if core components are not up yet 

details captured here: https://github.com/argoproj-labs/argocd-operator/issues/917

This bug affects our ability to export reliable operator metrics

Prerequisites (if any, like setup, operators/versions):

Steps to Reproduce

1. deploy the operator
2. create an argo-cd instance

1. verify that phase is initially set to Available and core components are running
2. edit argo-cd to set the image version to an invalid version:

spec:
version: dummy-version # See that core component pods are restarted with invalid image and stuck in pending

1. Confirm that argo-cd instance phase is still set to available

Actual results:

Phase remains set to "available"

Expected results:

Phase should say "pending"

Reproducibility (Always/Intermittent/Only Once):

Always

Acceptance criteria: 

Phase reconciliation should be fixed, so phase is always represented accurately

Definition of Done:

Build Details:

Additional info (Such as Logs, Screenshots, etc):

 *