- Add `flannel_backend_port` and `canal_flannel_backend_port` to config
the port of Flannel
- Add `flanneld_backend_vni` and `canal_flannel_backend_vni` to config
the VxLan network identify of Flannel
1. Support to configure Flannel as "host-gw" backend
2. Define the network component yaml and ingress
controller yaml only schedule to non-Windows node
3. Support to configure Docker container's port publishing