cephrgw: remove cnpg backup buckets (ec migration step 2) (#315)

Step 2 of the ec placement migration: with purge-on-delete now allowed (#313), removing the Bucket CRs makes the operator delete the underlying RGW buckets and their objects, freeing the names to be recreated on ec in step 3.

- remove the nine cnpg backup Bucket resources
- keep ObjectStoreUser and ScheduledBackup so the backup-s3 secrets and schedules survive

Reviewed-on: #315
Co-authored-by: Ben Vincent <ben@unkin.net>
Co-committed-by: Ben Vincent <ben@unkin.net>

apps/base/netbox/cnpg_backup.yaml

@@ -19,22 +19,6 @@ spec:
   # Keep the RGW user (and thus the keys) if this CR is ever deleted.
   retainOnDelete: true
 ---
-apiVersion: ceph.unkin.net/v1alpha1
-kind: Bucket
-metadata:
-  name: cnpg-netbox
-  namespace: netbox
-spec:
-  placementTarget: ec
-  bucketName: cnpg-netbox
-  ownerRef: cnpg-netbox-backup
-  versioning: false
-  tags:
-    app: netbox
-    purpose: cnpg-backup
-  retainOnDelete: false
-  purgeOnDelete: true
----
 apiVersion: postgresql.cnpg.io/v1
 kind: ScheduledBackup
 metadata: