[Documentation] Outdated references on multicluster page

[stigma34]

It appears the https://open-docs.neuvector.com/navigation/multicluster/ page is outdated. It has references to old service names that aren't in use in current deployments.

fed-master/fed-worker vs fed-master/fed-managed

Also it feels like the article doesn't even tell you about the relevant option to use the ConfigMap feature in https://open-docs.neuvector.com/deploying/production/configmap/#federated-configmap-examples-fedinitcfgyaml

Can the docs be updated to have the correct service names and maybe reference the other configuration method without having to unbury it from elsewhere?