[feat gw-api]handle resolvedRef for route status update and update ho…

[shuqz]

Description

1. handle several unhandled reasons for ResolveRef false case in route status update
   • "RefNotPermitted"
   • "InvalidKind"
   • "BackendNotFound"
   • "UnsupportedProtocol" -> this will be comparing protocol version with appProtocol. during testing, figured that we are validation protocol version value to be supported values: "http1", "http2", "grpc" which should be capitalized, so fixed it in CRD
2. modified logic for hostname precedence order

• in function sortRoutesByHostnamePrecedence, with the original logic, it only compares first element in each list to sort them. but it should be find the highest precedence in each list first and then use highest precedence hostname to sort.
• Also updated precedence order logic to count dot number, more dot means higher precedence, even though it might have shorter length

3. added more unit tests for route_reconciler.go, found that a lot are uncovered before

Checklist

• Added tests that cover your change (if possible)
• Added/modified documentation as required (such as the README.md, or the docs directory)
• Manually tested - some of the status update test result

------
status:
  addresses:
  - type: Hostname
    value: internal-customized-alb-lb-name-1399439441.us-west-2.elb.amazonaws.com
  conditions:
  - lastTransitionTime: "2025-05-30T20:00:19Z"
    message: Backend Ref must be of kind 'Service'. Invalid data can be found in route
      (HTTPRoute, gateway-alb:http-app-1)
    observedGeneration: 16
    reason: ListenersNotValid
    status: "False"
    type: Accepted
  - lastTransitionTime: "2025-05-29T22:38:20Z"
    message: arn:aws:elasticloadbalancing:us-west-2:850920876970:loadbalancer/app/customized-alb-lb-name/7e7271c93476a8ed
    observedGeneration: 16
    reason: Programmed
    status: "True"
    type: Programmed
------
status:
  parents:
  - conditions:
    - lastTransitionTime: "2025-05-30T20:00:19Z"
      message: Backend Ref must be of kind 'Service' - test with route message override
      observedGeneration: 138
      reason: InvalidKind
      status: "False"
      type: Accepted
    - lastTransitionTime: "2025-05-30T20:00:19Z"
      message: Backend Ref must be of kind 'Service' - test with route message override
      observedGeneration: 138
      reason: InvalidKind
      status: "False"
      type: ResolvedRefs
    controllerName: gateway.k8s.aws/alb
    parentRef:
      group: gateway.networking.k8s.io
      kind: Gateway
      name: test-gw-alb
      port: 80
----------------
status:
  parents:
  - conditions:
    - lastTransitionTime: "2025-05-30T19:55:42Z"
      message: Service port appProtocol http is not compatible with target group protocolVersion
        GRPC
      observedGeneration: 137
      reason: UnsupportedProtocol
      status: "False"
      type: Accepted
    - lastTransitionTime: "2025-05-30T19:55:42Z"
      message: Service port appProtocol http is not compatible with target group protocolVersion
        GRPC
      observedGeneration: 137
      reason: UnsupportedProtocol
      status: "False"
      type: ResolvedRefs
    controllerName: gateway.k8s.aws/alb
    parentRef:
      group: gateway.networking.k8s.io
      kind: Gateway
      name: test-gw-alb
      port: 80
----------------
status:
  parents:
  - conditions:
    - lastTransitionTime: "2025-05-30T19:48:47Z"
      message: Service port appProtocol grpc is not compatible with target group protocolVersion
        HTTP1
      observedGeneration: 134
      reason: UnsupportedProtocol
      status: "False"
      type: Accepted
    - lastTransitionTime: "2025-05-30T19:48:47Z"
      message: Service port appProtocol grpc is not compatible with target group protocolVersion
        HTTP1
      observedGeneration: 134
      reason: UnsupportedProtocol
      status: "False"
      type: ResolvedRefs
    controllerName: gateway.k8s.aws/alb
    parentRef:
      group: gateway.networking.k8s.io
      kind: Gateway
      name: test-gw-alb
      port: 80
status:
  parents:
  - conditions:
    - lastTransitionTime: "2025-05-30T19:52:28Z"
      message: Backend Ref must be of kind 'Service'
      observedGeneration: 135
      reason: InvalidKind
      status: "False"
      type: Accepted
    - lastTransitionTime: "2025-05-30T19:52:28Z"
      message: Backend Ref must be of kind 'Service'
      observedGeneration: 135
      reason: InvalidKind
      status: "False"
      type: ResolvedRefs
    controllerName: gateway.k8s.aws/alb
    parentRef:
      group: gateway.networking.k8s.io
      kind: Gateway
      name: test-gw-alb
      port: 80

• Made sure the title of the PR is a good description that can go into the release notes

BONUS POINTS checklist: complete for good vibes and maybe prizes?! 🤯

• Backfilled missing tests for code in same general area 🎉
• Refactored something and made the world a better place 🌟
• refactored LoaderError, now by default it will return initial error message but if there is override by gateway message or route message (e.g. with wrapped detailed info) it will return the overridden message

[k8s-ci-robot]

Hi @shuqz. Thanks for your PR.

I'm waiting for a kubernetes-sigs member to verify that this patch is reasonable to test. If it is, they should reply with /ok-to-test on its own line. Until that is done, I will not automatically test new commits in this PR, but the usual testing commands by org members will still work. Regular contributors should join the org to skip this step.

Once the patch is verified, the new status will be reflected by the ok-to-test label.

I understand the commands that are listed here.

Instructions for interacting with me using PR comments are available here. If you have questions or suggestions related to my behavior, please file an issue against the kubernetes-sigs/prow repository.

[zac-nixon]

/ok-to-test

[zac-nixon]

/approved
/lgtm

[k8s-ci-robot]

[APPROVALNOTIFIER] This PR is APPROVED

This pull-request has been approved by: shuqz, zac-nixon

The full list of commands accepted by this bot can be found here.

The pull request process is described here

Needs approval from an approver in each of these files:

• OWNERS [zac-nixon]

Approvers can indicate their approval by writing /approve in a comment
Approvers can cancel approval by writing /approve cancel in a comment