Support installation on OpenShift/OKD >= 4.14 without DeploymentConfig

[psy-q]

DeploymentConfig is deprecated starting with OpenShift/OKD 4.14 and should no longer be used.

Is your feature request related to a problem? Please describe.

Trying to install the Argo CD operator on such a cluster without DeploymentConfig enabled results in argocd-operator-controller-manager crashlooping with:

ERROR setup problem running manager {"error": "failed to wait for argocd caches to sync: timed out waiting for cache to be synced for Kind *v1.DeploymentConfig"}

Describe the solution you'd like
Ensure the operator works on OCP/OKD clusters that don't have the DeploymentConfig capability enabled. Normal Kubernetes Deployment manifests can be used instead.

Describe alternatives you've considered
None, since the resource is already deprecated and will be removed from OpenShift/OKD soon.

[svghadi]

Thank you @psy-q for creating the issue. We have some on-going efforts to address this in #1329.