Use server-side apply

argocd/app-of-apps/test/templates/applications.yaml

@@ -9,6 +9,10 @@ metadata:
     - resources-finalizer.argocd.argoproj.io
 spec:
   syncPolicy:
+    {{- if .serverSideApply }}
+    syncOptions:
+      - ServerSideApply=true
+    {{- end }}
     automated:
       prune: true
   destination:

argocd/app-of-apps/test/values.yaml

@@ -35,6 +35,7 @@ applications:
     namespace: observability
     createNamespace: true
     repoURL: https://git.2martens.de/2martens/cloud-configuration.git
+    serverSideApply: true
   - name: prometheus-adapter
     project: default
     targetRevision: main