Add automatic backup PVC creation with create_backup_pvc option (#2097)

When users specify a custom backup_pvc name, the operator now
automatically creates the PVC instead of failing with
"does not exist, please create this pvc first."

Changes:
- Add create_backup_pvc variable (default: true) to backup defaults
- Update error condition to check create_backup_pvc before failing
- Update PVC creation condition to include create_backup_pvc
- Add create_backup_pvc field to AWXBackup CRD

Users who want the previous behavior can set create_backup_pvc: false.

roles/backup/defaults/main.yml

@@ -8,6 +8,9 @@ api_version: '{{ deployment_type }}.ansible.com/v1beta1'
 backup_pvc: ''
 backup_pvc_namespace: "{{ ansible_operator_meta.namespace }}"
 
+# If true (default), automatically create the backup PVC if it does not exist
+create_backup_pvc: true
+
 # Size of backup PVC if created dynamically
 backup_storage_requirements: ''