test: Disable K8sKubeProxyFreeMatrix
test: Disable K8sKubeProxyFreeMatrix

The suite does not provide much value because of the following reasons:

- It does not test the kube-proxy replacement from outside, so only
  bpf_sock is tested.
- K8sServicesTest should provide the same coverage.
- It takes 20min to run the suite.

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

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