Update kube-prometheus-stack Docker tag to v55.7.0

kubernetes/apps/kube-system/cilium/app/helmrelease.yaml

@@ -34,6 +34,14 @@ spec:
         enabled: true
       ui:
         enabled: true
+      metrics:
+        # enabled: "{dns,drop,tcp,flow,port-distribution,icmp,httpV2:exemplars=true;labelsContext=source_ip,source_namespace,source_workload,destination_ip,destination_namespace,destination_workload,traffic_direction}"
+        enableOpenMetrics: true
+    prometheus:
+      enabled: true
+    operator:
+      prometheus:
+        enabled: true
     ipam:
       mode: kubernetes
     policyEnforcementMode: always    # enforce network policies