[DCN] Disable RGW in the DCN scenario

scenarios/reproducers/dt-dcn.yml

@@ -12,6 +12,11 @@ cifmw_lvms_disk_list:
   - /dev/vdb
   - /dev/vdc
 cifmw_devscripts_cinder_volume_pvs: []
+cifmw_ceph_daemons_layout:
+  rgw_enabled: false
+  dashboard_enabled: false
+  cephfs_enabled: true
+  ceph_nfs_enabled: false
 cifmw_run_tests: false
 cifmw_cephadm_log_path: /home/zuul/ci-framework-data/logs
 cifmw_arch_automation_file: dcn.yaml