Fix HTTP Redirect test for Contour (#12124)
Fix HTTP Redirect test for Contour (#12124)

* Fix HTTP Redirect test for Contour

When contour transforms kingress's `httpOption` from `Enabled` to
`Redirected`, it returns `404` slightly.

As updating the annotation re-deploys ingress object without
re-deploying pod so the general transition does not work.

This patch allows `404` for TestHttpRedirect during the transition.

* Fix lint

* Test only Redirect
knative/serving,knative/serving