Allow skipping NAT for the given destinations from a cluster network. This option makes it possible to form an etcd cluster from clusters in different networks created by running `talosctl cluster create` command multiple times using different CIDRs: they simply should have the CIDR of the other clusters passed with `--non-masquerade-cidrs`. Signed-off-by: Utku Ozdemir <utku.ozdemir@siderolabs.com>