EPIC - Implement each Knative Networking (Gateway API) conformance test

[carlisia]

These tests are reimplementation of the same conformance tests in https://github.com/knative/networking/tree/main/test/conformance/ingress. These tests are run without the net-gateway-api controller.

(test/kind-conformance-contour.sh)

• Add basics/*
  • TestBasics
  • TestBasicsHTTP2
  • reference: h2c (cleartext HTTP/2) protocol support kubernetes-sigs/gateway-api#204
• Add headers/*
  • TestProbeHeaders - Add TestProbeHeaders conformance test #349
  • TestPreSplitSetHeaders
  • TestPostSplitSetHeaders
  • references:
    • Implement HTTPRouteFilterRequestHeaderModifier for HTTPRouteFilter projectcontour/contour#3539
    • Implement Exact HTTPHeaderMatch projectcontour/contour#3538
• Add dispatch/*
  • TestPath
  • TestPercentage
    • reference: https://github.com/projectcontour/contour/issues/
  • TestPathAndPercentageSplit
  • TestRule
• Add TestMultipleHosts
• Add TestTimeout
• Add websocket/*
  • TestWebsocket
  • TestWebsocketSplit
  • reference: WebSocket protocol support kubernetes-sigs/gateway-api#205
• Add grpc/*
  • Add TestGRPC
  • TestGRPCSplit
• Add visibility/*
  • TestVisibility
  • TestVisibilitySplit
  • TestVisibilityPath
• TestRetry - Add TestRetry conformance test  #20
• TestIngressTLS - Add TestIngressTLS conformance test #351
  • note: test should pass based on Add support for TLS (conformance test passes) by evankanderson · Pull Request #316 · knative-sandbox/net-gateway-api, but still need to be implemented.
  • Add Gateway API TLS Support projectcontour/contour#3404
  • see: EPIC - Contour tests #36 (comment)
• TestUpdate - Add TestUpdate conformance test #352
• TestIngressClass - Add TestIngressClass conformance test #353