Migrate kube-webhook-certgen to k8s.gcr.io/ingress-nginx:v1.1.1
Migrate kube-webhook-certgen to k8s.gcr.io/ingress-nginx:v1.1.1

The admission webhook certificate generation fails on k8s v1.22, see jet/kube-webhook-certgen#30.
The jet upstream is no longer supported.
It was forked, moved into kubernetes/ingress-nginx, fixed
and is now published at k8s.gcr.io/ingress-nginx.

See also https://github.com/kubernetes/k8s.io/blob/main/k8s.gcr.io/images/k8s-staging-ingress-nginx/images.yaml

Signed-off-by: Mike Beaumont <7c55cb21de779eb1db34eb05403a1a3697016d91@gmail.com>

istio/gateway-api,istio/gateway-api,istio/gateway-api