Feature: Install AKS GitOps (ArgoCD) extension for team/member clusters

As a platform operator, I'd like to have ArgoCD installed via [the official extension](https://learn.microsoft.com/en-us/azure/azure-arc/kubernetes/tutorial-use-gitops-argocd) every time a new team cluster is spun up so that I don't have to maintain the security patches/updates and automatically get the security integration features provided from Microsoft.

Practically, this should be implemented using [ASO v2's Kubernetes extension configuration](https://azure.github.io/azure-service-operator/reference/kubernetesconfiguration/) on every new cluster provisioned via CAPZ. CAPZ can still utilize the helm addon for the initial ArgoCD App of Apps cluster bootstrap configuration (it no longer does the ArgoCD install).