Update connectivity in icp multicluster (#3294)
Update connectivity in icp multicluster (#3294)

* networking -> network connectivity

* single control plane topology -> single control plane topology with VPN connectivity

* a single control plane topology with VPN connectivity -> a single control plane with VPN connectivity topology

geeknoid/istio.github.io,istio/istio.io,geeknoid/istio.github.io,istio/istio.io,geeknoid/istio.github.io,istio/istio.io,istio/istio.io,geeknoid/istio.github.io,istio/istio.io,istio/istio.io,istio/istio.io,geeknoid/istio.github.io