Move to Go modules and use Go client 1.17

[alexellis]

Move to Go modules and use Go client 1.17

This change is being made to bring the operator into parity with
faas-netes and the openfaas-operator.

• Uses k8s Go client version 1.17
• Uses Go modules for dependencies

Vendor folder updated and update-codegen ran, fixed any
compilation errors from Ingress moving out of extensions and
into networking/v1beta1.

I believe that this changes breaks compatibility with Kubernetes 1.13 and lower
with 1.14 being the new min version.

Testing:

k3sup app install openfaas --set ingressOperator.create=true --set ingressOperator.image=openfaas/ingress-operator:0.5.1-rc2-amd64

faas-cli store deploy nodeinfo
kubectl port-forward -n kube-system svc/traefik 8081:80 &

kubectl apply -f ./artifacts/nodeinfo-ingress-traefik.yaml

kubectl get ingress -n openfaas -w

curl http://127.0.0.1:8081 -H "Host: nodeinfo.myfaas.club"

https://github.com/openfaas-incubator/ingress-operator/pull/22

I also had to bump up the Chart to give access to the networking.k8s.io apiGroup.

Signed-off-by: Alex Ellis (OpenFaaS Ltd) alexellis2@gmail.com