Enable experimental modules when rpm-ostree version >= 2021.9 (#8202)

* Enable experimental modules when rpm-ostree version >= 2021.9

* cleanup code

roles/container-engine/cri-o/tasks/main.yaml

@@ -11,6 +11,13 @@
   set_fact:
     is_ostree: "{{ ostree.stat.exists }}"
 
+- name: get ostree version
+  shell: "set -o pipefail && rpm-ostree --version | awk -F\\' '/Version/{print $2}'"
+  args:
+    executable: /bin/bash
+  register: ostree_version
+  when: is_ostree
+
 - name: gather os specific variables
   include_vars: "{{ item }}"
   with_first_found: