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: I5e9aac0216a7406fefe4bfe315bd914723c7e27c

tasks/gnocchi_post_install.yml

@@ -23,7 +23,7 @@
   register: _git_file_fetch
 
 - name: Copy gnocchi configuration files
-  config_template:
+  openstack.config_template.config_template:
     content: "{{ item.content | default(omit) }}"
     src: "{{ item.src  | default(omit) }}"
     dest: "{{ item.dest }}"