pyrocufflink: Set root password and SSH keys

1. Set a password for *root* on all machines (useful for logging in via
   serial console if network is down)
2. Set an authorized SSH key for root on all machines:

   * For Fedora 34, use my FIDO2 security token key
   * For all other hosts, use my ED25519 key

group_vars/pyrocufflink/main.yml

@@ -4,3 +4,10 @@ samba_use_winbind: true
 pam_winbind: true
 nss_winbind: true
 pam_mkhomedir: true
+
+root_authorized_keys: >-
+  {% if ansible_distribution == "Fedora" and ansible_distribution_version|int >= 34 %}
+  sk-ssh-ed25519@openssh.com AAAAGnNrLXNzaC1lZDI1NTE5QG9wZW5zc2guY29tAAAAINZCN2cxMDwedJ1Ke23Z3CZRcOYjqW8fFqsooRus7RK0AAAABHNzaDo= dustin@rosalina.pyrocufflink.blue
+  {% else %}
+  ssh-ed25519 AAAAC3NzaC1lZDI1NTE5AAAAIJsL5fSylmiJmBtW0DH/viAAmtU2E/2M17GPvysiyRs+ dustin@rosalina
+  {% endif %}