Fix kubernetes install methods

There are two problems with kubernetes installation currently. The first
is that cri-o's package location has moved. The second is the debian
bookworms snap install has gone stale and we should update it with snap
before installing more snaps.

Per the cri-o packaging README [0] the packages for cri-o moved from the
k8s package cdn to downloads.opensuse.org. Update our cri-o installation
tasks to use the correct package repo. Not updating produces HTTP 403
errors. I guess they want people to notice that they shouldn't use the
old location any longer.

In the case of debian bookworm the microk8s snap needs a core snap
version available in a newer snapd release. We can use snap to install
snap in order to update snap. Do that so that microk8s can be installed
on Debian.

[0] 3b30cfee75/README.md

Change-Id: Ied971eb4ae4f53440fdb7204540b4360ab797e74

roles/ensure-kubernetes/tasks/crio-default.yaml

@@ -6,10 +6,10 @@
   vars:
     repositories_keys:
       - url: "https://pkgs.k8s.io/core:/stable:/{{ ensure_kubernetes_kubectl_version }}/deb/Release.key"
-      - url: "https://pkgs.k8s.io/addons:/cri-o:/stable:/{{ ensure_kubernetes_kubectl_version }}/deb/Release.key"
+      - url: "https://download.opensuse.org/repositories/isv:/cri-o:/stable:/{{ ensure_kubernetes_kubectl_version }}/deb/Release.key"
     repositories_list:
       - repo: "deb https://pkgs.k8s.io/core:/stable:/{{ ensure_kubernetes_kubectl_version }}/deb/ /"
-      - repo: "deb https://pkgs.k8s.io/addons:/cri-o:/stable:/{{ ensure_kubernetes_kubectl_version }}/deb/ /"
+      - repo: "deb https://download.opensuse.org/repositories/isv:/cri-o:/stable:/{{ ensure_kubernetes_kubectl_version }}/deb/ /"
 
 - name: Install packages
   package:

roles/ensure-kubernetes/tasks/microk8s.yaml

@@ -9,6 +9,15 @@
     name: snapd
     state: present
 
+# Snapd isn't installed as a snap on Debian (it is on Ubuntu). After the
+# base install we use snap to update itself so that we're running a modern
+# snapd
+# Otherwise some snaps complain about missing their dependencies.
+- name: Update snap on Debian
+  become: yes
+  command: snap install core snapd
+  when: ansible_distribution == "Debian"
+
 - name: Install microk8s snap
   become: yes
   command: 'snap install microk8s --classic --channel={{ ensure_kubernetes_microk8s_channel }}'