Add virtualbox-iso target

Lots of other, small quality of life improvements to build process
Output of build serial console to artifacts upon failure
Reducing verbosity of Packer, now that serial output is captured
Fixed sizing problems with the boot partitions of Ubuntu versions
Use of Mac builders for Virtualbox targets
Updating Ubuntu builders to 22.04, as well

ansible/playbook.yml

@@ -1,18 +1,22 @@
 - name: install guest additions
   hosts: default
   pre_tasks:
-    - name: update all the things
+    - name: Update all the things
       become: true
       ansible.builtin.package:  # noqa package-latest
         name: "*"
         state: latest
       when: ansible_facts.pkg_mgr not in ['atomic_container']
 
-    - name: update atomic things
+    - name: Update atomic things
       become: true
       ansible.builtin.command: rpm-ostree upgrade
       when: ansible_facts.pkg_mgr in ['atomic_container']
       changed_when: false
+
+    - name: Restart the machine
+      become: true
+      ansible.builtin.reboot:
   roles:
     - role: virtualbox
       when: packer_builder_type == 'virtualbox-iso'