Routes that reference an ignored Gateway are marked as Accepted

[kate-osborn]

Describe the bug
Routes that reference an ignored Gateway are marked as Accepted:

Name:         coffee
Namespace:    default
Labels:       <none>
Annotations:  <none>
API Version:  gateway.networking.k8s.io/v1
Kind:         HTTPRoute
Metadata:
  Creation Timestamp:  2024-05-21T21:42:21Z
  Generation:          2
  Resource Version:    3076364
  UID:                 beec9954-aadc-4023-acac-4e1c6643d5b4
Spec:
  Hostnames:
    cafe.example.com
  Parent Refs:
    Group:         gateway.networking.k8s.io
    Kind:          Gateway
    Name:          ignored-gateway
    Section Name:  http
  Rules:
    Backend Refs:
      Group:
      Kind:    Service
      Name:    coffee
      Port:    80
      Weight:  1
    Matches:
      Path:
        Type:   PathPrefix
        Value:  /coffee
Status:
  Parents:
    Conditions:
      Last Transition Time:  2024-05-21T21:44:17Z
      Message:               The route is accepted
      Observed Generation:   2
      Reason:                Accepted
      Status:                True
      Type:                  Accepted
      Last Transition Time:  2024-05-21T21:44:17Z
      Message:               spec.rules[0].backendRefs[0].name: Not found: "coffee"
      Observed Generation:   2
      Reason:                BackendNotFound
      Status:                False
      Type:                  ResolvedRefs
      Last Transition Time:  2024-05-21T21:44:17Z
      Message:               The condition for this has not been implemented yet: Gateway is ignored
      Observed Generation:   2
      Reason:                TODO
      Status:                True
      Type:                  TODO
    Controller Name:         gateway.nginx.org/nginx-gateway-controller
    Parent Ref:
      Group:         gateway.networking.k8s.io
      Kind:          Gateway
      Name:          ignored-gateway
      Namespace:     default
      Section Name:  http

To Reproduce
Steps to reproduce the behavior:

1. Install NGF
2. Create 2 Gateways
3. Create an HTTP/GRPCRoute that references the ignored gateway
4. Check the status of the route

Expected behavior
The parentRef that references the ignored Gateway should have the condition Accepted/False.

Your environment

• Version of the NGINX Gateway Fabric - edge 5f9ec2d

Additional context