CI: Add ArchLinux, Debian Bullseye, CentOS Stream 8, and Alpine 3 (#4222) (#4244)

* Add ArchLinux, Debian Bullseye and CentOS Stream 8 to CI.

* Add Alpine to CI matrix as well.

(cherry picked from commit a06903f33a)

Co-authored-by: Felix Fontein <felix@fontein.de>

tests/integration/targets/timezone/tasks/main.yml

@@ -43,6 +43,12 @@
 #### timezone tests
 ####
 
+- name: make sure diffutils are installed on ArchLinux
+  package:
+    name: diffutils
+    state: present
+  when: ansible_distribution == 'Archlinux'
+
 - name: make sure the dbus service is started under systemd
   systemd:
     name: dbus
@@ -57,7 +63,9 @@
   # Skip tests on Fedora 31 and 32 because dbus fails to start unless the container is run in priveleged mode.
   # Even then, it starts unreliably. This may be due to the move to cgroup v2 in Fedora 31 and 32.
   # https://www.redhat.com/sysadmin/fedora-31-control-group-v2
-  when: ansible_facts.distribution ~ ansible_facts.distribution_major_version not in ['Fedora31', 'Fedora32']
+  when:
+    - ansible_facts.distribution ~ ansible_facts.distribution_major_version not in ['Fedora31', 'Fedora32']
+    - not (ansible_os_family == 'Alpine')  # TODO
   block:
     - name: set timezone to Etc/UTC
       timezone: