test: add iptables masquerading without random-fully test
test: add iptables masquerading without random-fully test

As suggested in the ticket, let's add a test for iptables masqueranding
_without_ the random-fully option. This should tell us if the
"K8sDatapathConfig Encapsulation Check iptables masquerading with
random-fully" test is failing due to the random-fully option or not.

Related-to: #13773

Signed-off-by: Gilberto Bertin <e45dca12016e9fd4d68d2c7903502c5e1a1f4f1b@isovalent.com>

tklauser/cilium,cilium/cilium,tklauser/cilium,tgraf/cilium,cilium/cilium,michi-covalent/cilium,michi-covalent/cilium,tgraf/cilium,tklauser/cilium,michi-covalent/cilium,tgraf/cilium,tgraf/cilium,tgraf/cilium,cilium/cilium,cilium/cilium,tklauser/cilium,michi-covalent/cilium,michi-covalent/cilium,tgraf/cilium,cilium/cilium,tklauser/cilium