Adopt deb822_repository format.

[ndouglas]

This isn't tested, since I'm using a custom role locally, but it's a lightly edited (for code style) version of what I'm doing.

Unfortunately, this whole transition seems to be quite messy and may require some manual work to clear out old keys, old sources, etc if this is rerun on a cluster with the previous system in place.

To go into more detail about why this can require cleanup, the previous approach would create e.g. /etc/apt/sources.list.d/kubernetes.list. This creates /etc/apt/sources.list.d/kubernes.source, so there can be two files pointing to sources for the Kubernetes packages. This also adds the new key in a different location, so there can be multiple keys.

The problem I encountered while fighting with this and iterating while targeting a cluster was that I'd get errors like "403 forbidden" when attempting to update the apt cache. That would occur when I was using the wrong suite or components arguments, since converting from the old to the new format is IMHO kinda poorly documented.

Then, once I got that sorted out, I had problems where my control plane was on 1.29.2 and my workers were on 1.28.2. This happened because I was working on bootstrapping my control plane (high availability, which is why I didn't use this role) and ended up iterating more on that, while my workers had received less attention. Turns out, I still had those apt-marked to pin the versions.

A sadder man, but wiser now, I open this PR for you.

[ndouglas]

7th time's a charm 🙂

[ndouglas]

@geerlingguy @rhino5oh made some tweaks here that have it passing tests. Not sure about the code style; I try to run apt cache updates at the playbook level as handlers, etc but it seems like it might be necessary here when the repository is added, because tests were failing otherwise. Might be a deficiency in my Ansible-fu tho.

EDIT: Ah, I see; ansible.builtin.apt_repository had an update_cache parameter which was set to true originally. ansible.builtin.deb822_repository does not. So it looks like I'm doing the right thing.