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: I69c8682c40a61e87156c1615c3b3eab67a76abe8

tasks/systemd_mounts.yml

@@ -51,7 +51,7 @@
     - "'credentials' in item"
 
 - name: Create systemd mount services(s)
-  config_template:
+  openstack.config_template.config_template:
     src: "systemd-mount.j2"
     dest: "/etc/systemd/system/{{ mount_service_name.stdout }}"
     owner: "root"