Rabbitmq vhost and user support

[lmiccini]

Add new messagingBus and notificationsBus interfaces to hold cluster,
user and vhost names for optional usage.
The controller adds these values to the TransportURL create request when present.

Additionally, we migrate RabbitMQ cluster name to RabbitMq config struct
using DefaultRabbitMqConfig from infra-operator to automatically
populate the new Cluster field from legacy RabbitMqClusterName.

Example usage:

  spec:
    messagingBus:
      cluster: rpc-rabbitmq
      user: rpc-user
      vhost: rpc-vhost
    notificationsBus:
      cluster: notifications-rabbitmq
      user: notifications-user
      vhost: notifications-vhost

Jira: https://issues.redhat.com/browse/OSPRH-23748

[openshift-ci]

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[softwarefactory-project-zuul]

Build failed (check pipeline). Post recheck (without leading slash)
to rerun all jobs. Make sure the failure cause has been resolved before
you rerun jobs.

https://softwarefactory-project.io/zuul/t/rdoproject.org/buildset/21b6a7a5e380419f85e577168460b770

✔️ openstack-k8s-operators-content-provider SUCCESS in 2h 06m 47s
❌ manila-operator-kuttl FAILURE in 12m 47s
✔️ manila-operator-tempest SUCCESS in 1h 42m 01s

[softwarefactory-project-zuul]

Build failed (check pipeline). Post recheck (without leading slash)
to rerun all jobs. Make sure the failure cause has been resolved before
you rerun jobs.

https://softwarefactory-project.io/zuul/t/rdoproject.org/buildset/d77952d29e284157b2890da54a2e198c

❌ openstack-k8s-operators-content-provider FAILURE in 10m 29s
⚠️ manila-operator-kuttl SKIPPED Skipped due to failed job openstack-k8s-operators-content-provider
⚠️ manila-operator-tempest SKIPPED Skipped due to failed job openstack-k8s-operators-content-provider

[openshift-ci]

@lmiccini: The following test failed, say /retest to rerun all failed tests or /retest-required to rerun all mandatory failed tests:

Test name	Commit	Details	Required	Rerun command
ci/prow/precommit-check	047d403	link	true	/test precommit-check

Full PR test history. Your PR dashboard.

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[softwarefactory-project-zuul]

Build failed (check pipeline). Post recheck (without leading slash)
to rerun all jobs. Make sure the failure cause has been resolved before
you rerun jobs.

https://softwarefactory-project.io/zuul/t/rdoproject.org/buildset/2b8edd07ef724e70a90816abf2295224

✔️ openstack-k8s-operators-content-provider SUCCESS in 2h 05m 56s
❌ manila-operator-kuttl RETRY_LIMIT in 5m 55s
✔️ manila-operator-tempest SUCCESS in 1h 36m 29s

[openshift-merge-robot]

PR needs rebase.

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