REFACTOR(repo): remove control-plane scheduling

- Remove nodeSelector for control-plane node
- Remove tolerations for control-plane taint
- Allow pods to schedule on any available node

postgresql/manifests/cluster.yaml

@@ -67,10 +67,6 @@ spec:
   # Affinity to spread replicas across nodes (soft - prefer different nodes)
   affinity:
     podAntiAffinityType: preferred
-    tolerations:
-      - key: "node-role.kubernetes.io/control-plane"
-        operator: "Exists"
-        effect: "NoSchedule"
 
   # Enable superuser access
   enableSuperuserAccess: true