Watch policies configured by Gateway params

[sergioifg94]

Description

Add new policiesToSync field to the GatewayClass parameters, which allows users to specify GVRs of policies to watch

Verification steps

Currently the watch only adds a log message when an event is triggered

1. Start the development environment
2. Apply the ConfigMap with the updated parameters to watch AuthPolicies:

   kubectl apply -f config/quick-start/control-cluster/cluster-config/configmap.yaml

3. Edit the GatewayClass to reference the parameters

   kubectl edit gatewayclass kuadrant-multi-cluster-gateway-instance-per-cluster -o yaml

   spec:
     controllerName: kuadrant.io/mgc-gw-controller
     parametersRef:
       group: ""
       kind: ConfigMap
       name: gateway-params
       namespace: multi-cluster-gateways

4. Ensure the AuthPolicies CRD is installed

   kubectl apply -f https://raw.githubusercontent.com/Kuadrant/kuadrant-operator/main/config/crd/bases/kuadrant.io_authpolicies.yaml 

5. Edit the controller ClusterRole to have the ability of watching AuthPolicies

   kubectl edit clusterroles mgc-manager-role 

   Add the following rule

   - apiGroups:
     - kuadrant.io
     resources:
     - authpolicies
     - ratelimitpolicies
     verbs:
     - get
     - list
     - watch

6. Run the controller from this branch (either build new image or run locally ensuring no other instance of the controller is running in cluster)
7. Create an AuthPolicy

   kubectl apply -f https://raw.githubusercontent.com/Kuadrant/kuadrant-operator/main/config/samples/kuadrant_v1beta1_authpolicy.yaml

8. Verify the event is logged in the controller

   2023-10-10T10:00:30Z    INFO    Got watch event for policy      {"controller": "gateway", "controllerGroup": "gateway.networking.k8s.io", "controllerKind": "Gateway", "Gateway": {"name":"prod-web","namespace":"multi-cluster-gateways"}, "namespace": "multi-cluster-gateways", "name": "prod-web", "reconcileID": "a3277e6e-51c3-4cd8-bdea-d6b8b81e4606", "obj": {"apiVersion": "kuadrant.io/v1beta1", "kind": "AuthPolicy", "namespace": "default", "name": "toystore"}}
   ...
   2023-10-10T10:00:30Z    INFO    Syncing policy  {"policy": {"apiVersion":"kuadrant.io/v1beta1","kind":"AuthPolicy", ...
   

[openshift-ci]

[APPROVALNOTIFIER] This PR is APPROVED

This pull-request has been approved by: sergioifg94

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[R-Lawton]

👀

[R-Lawton]

Tested locally works as expect saw the logs

[sergioifg94]

Thanks @R-Lawton I just pushed a commit with small improvements including the suggestion you made

[R-Lawton]

/lgtm