refactor(argocd): Use server-side apply for all apps

argocd-apps/add-ons/postgres.yaml

@@ -2,6 +2,7 @@ apiVersion: argoproj.io/v1alpha1
 kind: Application
 metadata:
   annotations:
+    argocd.argoproj.io/client-side-apply-migration-manager: argocd-controller
     argocd.argoproj.io/sync-wave: "1"
   name: postgres
   namespace: argocd
@@ -20,3 +21,4 @@ spec:
       selfHeal: true
     syncOptions:
       - CreateNamespace=true
+      - ServerSideApply=true