Add RabbitmqClusters to categories all

[ChunyiLyu]

This closes #

Note to reviewers: remember to look at the commits in this PR and consider if they can be squashed

Summary Of Changes

Organized kubebuilder markers a bit, it looked a bit messy before.

With this change you can see rabbitmqclusters when doing kubectl get all, like

❯ k get all
NAME                                             READY   STATUS    RESTARTS   AGE
pod/rabbitmq-cluster-operator-84c7588b78-768tk   1/1     Running   0          13m
pod/sample-server-0                              1/1     Running   0          8m33s

NAME                   TYPE           CLUSTER-IP     EXTERNAL-IP      PORT(S)                          AGE
service/sample         LoadBalancer   10.7.248.214   34.105.166.183   5672:30898/TCP,15672:31213/TCP   8m34s
service/sample-nodes   ClusterIP      None           <none>           4369/TCP,25672/TCP               8m34s

NAME                                        READY   UP-TO-DATE   AVAILABLE   AGE
deployment.apps/rabbitmq-cluster-operator   1/1     1            1           13m

NAME                                                   DESIRED   CURRENT   READY   AGE
replicaset.apps/rabbitmq-cluster-operator-84c7588b78   1         1         1       13m

NAME                             READY   AGE
statefulset.apps/sample-server   1/1     8m34s

NAME                                  AGE
rabbitmqcluster.rabbitmq.com/sample   8m34s

Additional Context

Local Testing

Please ensure you run the unit, integration and system tests before approving the PR.

To run the unit and integration tests:

$ make unit-tests integration-tests

You will need to target a k8s cluster and have the operator deployed for running the system tests.

For example, for a Kubernetes context named dev-bunny:

$ kubectx dev-bunny
$ make destroy deploy-dev
# wait for operator to be deployed
$ make system-tests