Add Galera database PVC deletion to cleanup playbook

The cleanup now deletes both types of Galera PVCs:

1. Backup storage PVCs (openstack.org/backup=true label)
   - Created by GaleraBackup CRs
   - Contain database dump files
   - Restored from OADP backup

2. Galera database PVCs (app=galera label)
   - Created by Galera StatefulSet
   - Contain live database data
   - Recreated and restored from database dumps during restore

Both types must be deleted during cleanup to ensure clean
restore from backup.

Co-Authored-By: Claude Sonnet 4.5 <noreply@anthropic.com>

Author: stuggi

docs/dev/playbooks/cleanup-openstack-ctlplane.yaml

@@ -69,6 +69,7 @@
           - GaleraRestore CRs
           - GaleraBackup CRs
           - PVCs labeled with openstack.org/backup=true (Galera backups, Glance, Cinder, Swift, Manila)
+          - Galera database PVCs (app=galera)
           - RabbitMQUser CRs (all)
           - RabbitMQ restored-user secrets
           - Certificates and secrets (excluding EDPM/compute certs and Ceph)
@@ -179,23 +180,30 @@
       ansible.builtin.debug:
         msg: "✓ GaleraRestore and GaleraBackup CRs deleted"
 
-    - name: Step 4 - Delete PVCs with backup label
+    - name: Step 4 - Delete PVCs
       ansible.builtin.debug:
         msg:
           - "========================================"
-          - "Step 4: Deleting PVCs with backup label"
+          - "Step 4: Deleting PVCs"
           - "========================================"
-          - "(Galera backups, Glance, Cinder, Swift, Manila)"
+          - "Backup storage PVCs (Galera backups, Glance, Cinder, Swift, Manila)"
+          - "Galera database PVCs"
 
     - name: Delete PVCs labeled for backup
       ansible.builtin.shell: |
         oc delete pvc -n {{ openstack_namespace }} -l openstack.org/backup=true
       changed_when: true
       failed_when: false
 
+    - name: Delete Galera database PVCs
+      ansible.builtin.shell: |
+        oc delete pvc -n {{ openstack_namespace }} -l app=galera
+      changed_when: true
+      failed_when: false
+
     - name: Print PVC cleanup status
       ansible.builtin.debug:
-        msg: "✓ PVCs with openstack.org/backup=true label deleted"
+        msg: "✓ PVCs with openstack.org/backup=true label and Galera database PVCs deleted"
 
     - name: Step 5 - Delete RabbitMQUser CRs and restored secrets
       ansible.builtin.debug: