Description of problem:

Changing host in the Argo CD CR for Argo CD Server does not update the ingress configuration.

Complete details here - https://github.com/argoproj-labs/argocd-operator/issues/558

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

Steps to Reproduce

Do a kubectl apply on something like:

```yaml
apiVersion: argoproj.io/v1alpha1
kind: ArgoCD
metadata:
  name: argocd
spec:
  server:
    ingress:
      enabled: true
```

followed by a kubectl apply on something like:

```yaml
apiVersion: argoproj.io/v1alpha1
kind: ArgoCD
metadata:
  name: argocd
spec:
  server:
    host: foo.bar

    ingress:
      enabled: true
```

then the host will still be set to the default value when describing the ingress.

Actual results:

Expected results:

• • Changing host in the Argo CD CR should update the ingress configuration*

    Reproducibility (Always/Intermittent/Only Once):

    Always

    Acceptance criteria: 

• Fix the issue in the Argo CD Operator.
• Add tests to validate the change (Unit and E2E)
• Bring the changes to the downstream - GitOps Operator along with the tests.
• Document the fix in the release notes.

Definition of Done:

Build Details:

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

 *