Describe the bug

The PVC are removed when deleting RabbitmqCluster despite persistentVolumeClaimRetentionPolicy.

To Reproduce

Steps to reproduce the behavior:

1. Deploy a RabbitmqCluster with:

override:
  statefulSet:
    spec:
      persistentVolumeClaimRetentionPolicy:
        whenDeleted: Retain
        whenScaled: Retain

2. Delete the RabbitmqCluster
3. See that the PVC are removed

Expected behavior
The PVC should not be removed when deleting a RabbitmqCluster when persistentVolumeClaimRetentionPolicy.whenDeleted=Retain.

Version and environment information

• RabbitMQ: 4.1.3
• RabbitMQ Cluster Operator: 2.17.0
• Kubernetes: v1.30.9
• Cloud provider: AKS

Additional context

This issue follows #855. persistentVolumeClaimRetentionPolicy is now implemented, but doesn't work.