proxmox: switch to deb822 source format

Debian did, Proxmox did, now we did too. Also enable ceph repository
if ceph-version is set in config context.

roles/proxmox/tasks/repositories.yml

@@ -0,0 +1,33 @@
+- name: Disable enterprise repositories
+  deb822_repository:
+    name: pve-enterprise
+    state: absent
+  notify: update package cache
+
+- name: Enable no-subscription repositories
+  deb822_repository:
+    name: proxmox
+    uris: http://download.proxmox.com/debian/pve
+    suites: "{{ ansible_distribution_release }}"
+    components: pve-no-subscription
+    signed_by: /usr/share/keyrings/proxmox-archive-keyring.gpg
+  notify: update package cache
+
+- name: Disable ceph repositories if not needed
+  when: "'ceph-version' not in hostvars[inventory_hostname]"
+  deb822_repository:
+    name: ceph
+    state: absent
+  notify: update package cache
+
+- name: Enable no-subscription ceph repositories
+  when: "'ceph-version' in hostvars[inventory_hostname]"
+  deb822_repository:
+    name: ceph
+    uris: "http://download.proxmox.com/debian/ceph-{{ hostvars[inventory_hostname]['ceph-version'] }}"
+    suites: "{{ ansible_distribution_release }}"
+    components: no-subscription
+    signed_by: /usr/share/keyrings/proxmox-archive-keyring.gpg
+  notify: update package cache
+
+- meta: flush_handlers