Replace usage of meshExpansion flag with istiod gateway code sample (#7869)

* Replace usage of meshExpansion flag with istiod gateway code sample

As part of https://github.com/istio/istio/issues/25933

* Update content/en/docs/setup/install/virtual-machine/index.md

Co-authored-by: Frank Budinsky <frankb@ca.ibm.com>

* Update content/en/docs/setup/install/virtual-machine/index.md

Co-authored-by: Frank Budinsky <frankb@ca.ibm.com>

* Update content/en/docs/setup/install/multicluster/shared/index.md

Co-authored-by: Frank Budinsky <frankb@ca.ibm.com>

Co-authored-by: Frank Budinsky <frankb@ca.ibm.com>

content/en/docs/setup/install/multicluster/shared/index.md

@@ -154,10 +154,6 @@ spec:
           gateways:
           - registry_service_name: istio-ingressgateway.istio-system.svc.cluster.local
             port: 443
-
-      # Use the existing istio-ingressgateway.
-      meshExpansion:
-        enabled: true
 EOF
 {{< /text >}}
 
@@ -216,6 +212,12 @@ Apply the primary cluster's configuration.
 $ istioctl install -f istio-main-cluster.yaml --context=${MAIN_CLUSTER_CTX}
 {{< /text >}}
 
+If you selected the `istio-ingressgateway` option, expose the control plane using the provided sample configuration.
+
+{{< text bash >}}
+$ kubectl apply -f @samples/istiod-gateway/istiod-gateway.yaml@
+{{< /text >}}
+
 Wait for the control plane to be ready before proceeding.
 
 {{< text bash >}}
@@ -533,6 +535,7 @@ $ rm istio-remote0-cluster.yaml
 To uninstall the primary cluster, run the following command:
 
 {{< text bash >}}
+$ kubectl delete --ignore-not-found=true -f @samples/istiod-gateway/istiod-gateway.yaml@
 $ istioctl manifest generate -f istio-main-cluster.yaml --context=${MAIN_CLUSTER_CTX} | \
     kubectl delete -f - --context=${MAIN_CLUSTER_CTX}
 $ kubectl delete namespace sample --context=${MAIN_CLUSTER_CTX}

content/en/docs/setup/install/virtual-machine/index.md

@@ -46,26 +46,18 @@ and `SERVICE_ACCOUNT`
 
 ## Install the Istio control plane
 
-Install Istio with the installation setting `values.global.meshExpansion.enabled: true`.
+Install Istio and expose the control plane so that your virtual machine can access it.
 
-1. Create the `IstioOperator` custom resource:
+1. Install Istio.
 
     {{< text bash >}}
-    $ cat <<EOF> "${WORK_DIR}"/vmintegration.yaml
-    apiVersion: install.istio.io/v1alpha1
-    kind: IstioOperator
-    spec:
-      values:
-        global:
-          meshExpansion:
-            enabled: true
-    EOF
+    $ istioctl install
     {{< /text >}}
 
-1. Install or upgrade Istio with virtual machine integration features enabled.
+1. Expose the control plane using the provided sample configuration.
 
     {{< text bash >}}
-    $ istioctl install -f "${WORK_DIR}"/vmintegration.yaml
+    $ kubectl apply -f @samples/istiod-gateway/istiod-gateway.yaml@
     {{< /text >}}
 
 ## Configure the VM namespace
@@ -257,7 +249,8 @@ Then, remove the Istio-sidecar package:
 To uninstall Istio, run the following command:
 
 {{< text bash >}}
-$ istioctl manifest generate -f "${WORK_DIR}"/vmintegration.yaml | kubectl delete -f -
+$ kubectl delete -f @samples/istiod-gateway/istiod-gateway.yaml@
+$ istioctl manifest generate | kubectl delete -f -
 {{< /text >}}
 
 The control plane namespace (e.g., `istio-system`) is not removed by default.