test: Extend testNodePort
test: Extend testNodePort

Add the following test cases:

- 10 x curl from k8s1 to http://k8s1:node_port
- 10 x curl from k8s1 to http://k8s2:node_port
- 10 x curl from pod to http://127.0.0.1:node_port (BPF NodePort only).

Signed-off-by: Martynas Pumputis <6b0d31c0d563223024da45691584643ac78c96e8@lambda.lt>

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