Issue: Metrics are not visible in Kiali dashboard when integrating with User-Workload-Monitoring.

How to reproduce: 

1. Create new project for service mesh control plane. // oc new-project istio-system
2. Install the Operators required for OpenShift Service Mesh installation.
3. Configure the SMCP as follows:

4. apiVersion: maistra.io/v2
   kind: ServiceMeshControlPlane
   metadata:
     name: basic
     namespace: istio-system
   spec:
     addons:
       prometheus:
         enabled: false 
       grafana:
         enabled: false 
       kiali:
         name: kiali-user-workload-monitoring
     meshConfig:
       extensionProviders:
       - name: prometheus
         prometheus: {}

1. Create new project bookinfo // oc new-project bookinfo
2. Configure SMMR as follows: 

3. apiVersion: maistra.io/v1
   kind: ServiceMeshMemberRoll
   metadata:
     name: default
     namespace: istio-system
   spec:
     members:
     - bookinfo 

1. Deploy bookinfo application by following this doc
2. Enable User-workload-monitoring by following this doc
3. Follow the steps as mentioned in this doc
   1. NOTE: While creating kind: Kiali CR ensure to add spec.version: v1.73
4. After all the above steps are configured run the following: 
   1. ROUTE=`oc get route istio-ingressgateway  -n istio-system  -o jsonpath='{.spec.host}'`
   2. for i in `seq 1 10`; do curl -I $ROUTE/productpage;done
5. Visit Kiali route that and check Kiali route --> Applications --> istio-ingressgateway --> Inbound Metrics / Outbound Metrics 

 oc get csv -n openshift-operators
NAME                             DISPLAY                                          VERSION     REPLACES                         PHASE
elasticsearch-operator.v5.8.12   OpenShift Elasticsearch Operator                 5.8.12      elasticsearch-operator.v5.8.11   Succeeded
jaeger-operator.v1.57.0-10       Red Hat OpenShift distributed tracing platform   1.57.0-10   jaeger-operator.v1.57.0-7        Succeeded
kiali-operator.v1.89.1           Kiali Operator                                   1.89.1      kiali-operator.v1.73.10          Succeeded
servicemeshoperator.v2.6.1       Red Hat OpenShift Service Mesh                   2.6.1-0     servicemeshoperator.v2.6.0       Succeeded
tempo-operator.v0.13.0-1         Tempo Operator                                   0.13.0-1    tempo-operator.v0.10.0-8         Succeeded

Expectation: 
Metrics should be seen. 

What is observed ? 

Metrics is not loaded.