Replace deprecated azure cli extension

1. Replace deprecated azure cli extension k8sconfiguration with k8s-configuration
2. Add selector when multiple subscriptions exist

Scenarios/AzSHCI and Kubernetes/Scenario.ps1

@@ -504,16 +504,23 @@ reg add "HKCU\Software\Microsoft\Windows\CurrentVersion\Internet Settings\ZoneMa
 reg add "HKCU\Software\Microsoft\Windows\CurrentVersion\Internet Settings\ZoneMap\EscDomains\msauth.net\aadcdn" /v https /t REG_DWORD /d 2
 reg add "HKCU\Software\Microsoft\Windows\CurrentVersion\Internet Settings\ZoneMap\EscDomains\msauth.net\logincdn" /v https /t REG_DWORD /d 2
 reg add "HKCU\Software\Microsoft\Windows\CurrentVersion\Internet Settings\ZoneMap\EscDomains\msftauth.net\aadcdn" /v https /t REG_DWORD /d 2
+
 az login
+$allSubscriptions = (az account list | ConvertFrom-Json).ForEach({$_ | Select-Object -Property Name, id, tenantId })
+if (($allSubscriptions).Count -gt 1){
+    $subscription = ($allSubscriptions | Out-GridView -OutputMode Single)
+    az account set --subscription $subscription.id
+}
+
 #create configuration
 $ClusterName="AzSHCI-Cluster"
 $KubernetesClusterName="demo"
 $resourcegroup="$ClusterName-rg"
-az k8sconfiguration create --name cluster-config --cluster-name $KubernetesClusterName --resource-group $resourcegroup --operator-instance-name cluster-config --operator-namespace cluster-config --repository-url https://github.com/Azure/arc-k8s-demo --scope cluster --cluster-type connectedClusters
+az k8s-configuration create --name cluster-config --cluster-name $KubernetesClusterName --resource-group $resourcegroup --operator-instance-name cluster-config --operator-namespace cluster-config --repository-url https://github.com/Azure/arc-k8s-demo --scope cluster --cluster-type connectedClusters
 #az connectedk8s delete --name cluster-config --resource-group $resourcegroup
 
 #validate
-az k8sconfiguration show --name cluster-config --cluster-name $KubernetesClusterName --resource-group $resourcegroup --cluster-type connectedClusters
+az k8s-configuration show --name cluster-config --cluster-name $KubernetesClusterName --resource-group $resourcegroup --cluster-type connectedClusters
 [System.Environment]::SetEnvironmentVariable('PATH',$Env:PATH+';c:\program files\AksHci')
 kubectl get ns --show-labels
 kubectl -n cluster-config get deploy -o wide