[gardener-extension-networking-cilium]

🏃 Others

• [OPERATOR] Cleanup unneeded container images etcd-operator, node-init and preflight. (gardener/gardener-extension-networking-cilium#146, @axel7born)
• [OPERATOR] Disable native routing mode for cilium. (gardener/gardener-extension-networking-cilium#151, @DockToFuture)