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: Ie4e45d41b070c5abbc3b80305aeee89470ee739a

tasks/heat_post_install.yml

@@ -14,7 +14,7 @@
 # limitations under the License.
 
 - name: Drop heat Config(s)
-  config_template:
+  openstack.config_template.config_template:
     src: "heat.conf.j2"
     dest: "/etc/heat/heat.conf"
     owner: "root"
@@ -27,7 +27,7 @@
     - Restart uwsgi services
 
 - name: Implement policy.yaml if there are overrides configured
-  config_template:
+  openstack.config_template.config_template:
     content: "{{ heat_policy_overrides }}"
     dest: "/etc/heat/policy.yaml"
     owner: "root"
@@ -71,7 +71,7 @@
   with_items: "{{ heat_core_files }}"
 
 - name: Copy common config
-  config_template:
+  openstack.config_template.config_template:
     src: "{{ item.tmp_f }}"
     dest: "{{ item.target_f }}"
     owner: "root"