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: I97990584dfe72bec3173595a3ba04f2651d9e7df

tasks/galera_client_post_install.yml

@@ -14,7 +14,7 @@
 # limitations under the License.
 
 - name: Drop local .my.cnf file
-  config_template:
+  openstack.config_template.config_template:
     src: "client.my.cnf.j2"
     dest: "/root/.my.cnf"
     owner: "root"

tasks/galera_server_encryption.yml

@@ -12,7 +12,7 @@
 # limitations under the License.
 
 - name: Create encryption config
-  config_template:
+  openstack.config_template.config_template:
     src: "{{ item.src }}"
     dest: "{{ item.dest }}"
     owner: "root"

tasks/galera_server_post_install.yml

@@ -104,7 +104,7 @@
   with_items: "{{ mariadb_delete_etc_conf_files | default([]) }}"
 
 - name: Drop mariadb config(s)
-  config_template:
+  openstack.config_template.config_template:
     src: "{{ item.src }}"
     dest: "{{ item.dest }}"
     owner: "root"