Automatic merge from submit-queue

Use the cluster name in the names of the firewall rules that allow cluster-internal traffic to disambiguate the rules belonging to different clusters.

Also dropping the network name from these firewall rule names.

Network name was used to disambiguate firewall rules in a given network.
However, since two clusters cannot share a name in a GCE project, this
sufficiently disambiguates the firewall rule names. A potential confusion
arises when someone tries to create a firewall rule with the same name
in a different network, but that's also an indication that they shouldn't
be doing that.


@jszczepkowski due to PR #33094
@ixdy for test-infra

cc @kubernetes/sig-federation @nikhiljindal