powertools-repo: Move to submodule software

roles/powertools-repo/tasks/main.yml

@@ -1,18 +0,0 @@
----
-- name: check if repository is enabled
-  command:
-    argv:
-      - cat
-      - /etc/yum.repos.d/CentOS-Linux-PowerTools.repo
-  changed_when: false
-  register: result
-
-- name: enable repository
-  command:
-    argv:
-      - dnf
-      - config-manager
-      - --set-enabled
-      - powertools
-    warn: false
-  when: "'enabled=1' not in result.stdout_lines"