iptables: invert conditions to simplify logic
iptables: invert conditions to simplify logic

Invert the matching condition in removeCiliumRules, doCopyProxyRule and
addProxyRules to allow continuing to the next rule and reduce branching.

Signed-off-by: Gilberto Bertin <a93f35d43382e9739cc1b4df252abaa0d7c5c77f@cilium.io>

cilium/cilium,cilium/cilium,michi-covalent/cilium,cilium/cilium,michi-covalent/cilium,michi-covalent/cilium,michi-covalent/cilium,cilium/cilium,michi-covalent/cilium,cilium/cilium