testing: enable external TC tests for NodePort in CI
testing: enable external TC tests for NodePort in CI

Add also tests for (external) TC under DSR/SNAT/Hybrid modes to our
CI so they can be performed from the third host. So far we don't seem
to test all of them (only for the metal LB case).

Signed-off-by: Daniel Borkmann <3d0f3b9ddcacec30c4008c5e030e6c13a478cb4f@iogearbox.net>

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