switch_to_container: fix osd systemd regex

The systemd LOAD and ACTIVE fileds could have more than one space between
both values.
This update the systemd regex the same way we're using it in different
part of the code.

Closes: https://bugzilla.redhat.com/show_bug.cgi?id=1843500

Signed-off-by: Dimitri Savineau <dsavinea@redhat.com>
(cherry picked from commit 50140c9)

infrastructure-playbooks/switch-from-non-containerized-to-containerized-ceph-daemons.yml

@@ -209,7 +209,7 @@
 
     - name: collect running osds
       shell: |
-        systemctl list-units | grep "loaded active" | grep -Eo 'ceph-osd@[0-9]+.service|ceph-volume|ceph\.target'
+        systemctl list-units | grep -E "loaded * active" | grep -Eo 'ceph-osd@[0-9]+.service|ceph-volume|ceph\.target'
       register: running_osds
       changed_when: false
       failed_when: false