Fix the flake in the ingress test where the order might differ (#6289)
Fix the flake in the ingress test where the order might differ (#6289)

Due to how maps are iterated the results sometimes differ.
 e.g.: https://prow.knative.dev/view/gcs/knative-prow/pr-logs/pull/knative_serving/6288/pull-knative-serving-unit-tests/1208490129887334402
So sort by port to make sure things are passing
>gt -count=10 -race -run=TestListProbeTargets
 PASS
> ok      knative.dev/serving/pkg/reconciler/ingress      1.018s
knative-sandbox/net-istio,knative-sandbox/net-istio