README: fix ci-aio and ci-builder setup instructions

[markgoddard]

No description provided.

[jackhodgkiss]

Would it not also be beneficial to add acl as a required package?

[markgoddard]

Good question. I'm not sure where is the right place to install that package. Ansible docs suggest it happens when using become and become_user with an unprivileged user, which is not that common. Still, it might be useful to install the package in Kayobe.

In fact, we already do, just in a specific code path that you didn't hit:

# NOTE(mgoddard): The acl package is required for the setfacl command, used by
# become_user.
- name: Ensure acl package is installed
  package:
    name: acl
    cache_valid_time: "{{ apt_cache_valid_time if ansible_facts.os_family == 'Debian' else omit }}"
    update_cache: "{{ True if ansible_facts.os_family == 'Debian' else omit }}"
  become: true

So we could move that code somewhere more general.

[markgoddard]

https://review.opendev.org/c/openstack/kayobe/+/853424