Use config_template as a collection

Since we still use ceph-ansible that has their own implementation of
config_template module it's worth to use mentioned module as a collection
explicitly.

Depends-On: https://review.opendev.org/c/openstack/openstack-ansible/+/819814



Change-Id: Iee883f6d9240918c9168a7cd7c6b9dbce02eabfc

tasks/ceph_config.yml

@@ -43,7 +43,7 @@
     - ceph_conf_file is defined
 
 - name: Create ceph.conf from mon host
-  config_template:
+  openstack.config_template.config_template:
     content: '{{ ceph_conf }}'
     dest: /etc/ceph/ceph.conf
     owner:  root