Improve ArchLinux tests (#4291) (#4295)

* Make sure that every test that uses package: requires setup_pkg_mgr.

* Upgrade system packages for Arch Linux.

* Re-enable java keytool tests on Arch.

(cherry picked from commit 274b8cceef)

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

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

@@ -16,9 +16,20 @@
     cacheable: yes
   when: ansible_os_family == "Suse"
 
+- set_fact:
+    pkg_mgr: community.general.pacman
+    ansible_pkg_mgr: community.general.pacman
+    cacheable: yes
+  when: ansible_os_family == "Archlinux"
+
 - shell:
     cmd: |
       sed -i 's/mirrorlist/#mirrorlist/g' /etc/yum.repos.d/CentOS-Linux-*.repo
       sed -i 's%#baseurl=http://mirror.centos.org/$contentdir/$releasever/%baseurl=https://vault.centos.org/8.4.2105/%g' /etc/yum.repos.d/CentOS-Linux-*.repo
   ignore_errors: true  # This fails for CentOS Stream 8
   when: ansible_distribution in 'CentOS' and ansible_distribution_major_version == '8'
+
+- when: ansible_os_family == "Archlinux"
+  block:
+    - name: ArchLinux specific setup
+      include: archlinux.yml