Multicluster documentation uses the operator installation model

[kbreit]

The documentation at https://istio.io/latest/docs/setup/install/multicluster/primary-remote/ shows how to install Istio using the operator model. However, the operator installation documentation at https://istio.io/latest/docs/setup/install/operator/ says

Use of the operator for new Istio installations is discouraged in favor of the Istioctl and Helm installation methods. While the operator will continue to be supported, new feature requests will not be prioritized.

The documentation for installation should focus on recommended methods instead of deprecated methods.