Make ingress prober ready when gets StatusMovedPermanently for the response (#5194)
Make ingress prober ready when gets StatusMovedPermanently for the response (#5194)

* Make ingress prober ready when gets StatusMovedPermanently for the response

When httpProtocol is configured as "Redirected", http response
StatusMovedPermanently(301) instead of StatusOK(200).
This patch allows ingress prober to pass 301 response as the exception.

* Use ExpectsStatusCodes with Verifier

knative-sandbox/net-istio,knative-sandbox/net-istio