Allow LVM filter to work when either allowlist or denylist are empty

Fixes the LVM filter task for it to build correctly formatted lists
when either one of allowlist or denylist are empty.

Change-Id: Ib3e8bfbabbd9c46af8aa032b23d68b8918cc444d
Closes-Bug: 1944743
(cherry picked from commit 7c2467c982)
(cherry picked from commit 4ceb98f2df)
(cherry picked from commit 810fb36e3b)
(cherry picked from commit 2050d66047)

tripleo_ansible/roles/tripleo_lvmfilter/tasks/main.yml

@@ -44,15 +44,15 @@
                          | unique }}"
     - name: build lvm2 allow list
       set_fact:
-        lvm2_allow_list: "\"{{ allowed_devices | map('regex_replace', '(.+)', 'a|\\1|')
-                         | join('\",\"') }}\""
+        lvm2_allow_list: "{{ allowed_devices
+                         | map('regex_replace', '(.+)', 'a|\\1|') | list }}"
     - name: build lvm2 deny list
       set_fact:
-        lvm2_deny_list: "\"{{ tripleo_tripleo_lvmfilter_devices_denylist | default([])
-                        | map('regex_replace', '(.+)', 'r|\\1|') | join('\",\"') }}\""
+        lvm2_deny_list: "{{ tripleo_tripleo_lvmfilter_devices_denylist | default([])
+                        | map('regex_replace', '(.+)', 'r|\\1|') | list }}"
     - name: build lvm2 filter
       set_fact:
-        lvm2_filter: "{{ lvm2_allow_list + ',' + lvm2_deny_list }}"
+        lvm2_filter: "\"{{ (lvm2_allow_list + lvm2_deny_list) | join('\",\"') }}\""
     - name: regenerate lvm config
       become: true
       command: >