Rework Role Structure (#254)

* Add more defaults
* Rename roles, covert download to airgap role
* Remove unnecessary gather_facts

Signed-off-by: Derek Nola <derek.nola@suse.com>

playbook/upgrade.yml

@@ -4,15 +4,13 @@
 # Agents have no such limitation
 - name: Upgrade K3s Servers
   hosts: server
-  gather_facts: true
   become: true
   serial: 1
   roles:
-    - role: upgrade
+    - role: k3s_upgrade
 
 - name: Upgrade K3s Agents
   hosts: agent
-  gather_facts: true
   become: true
   roles:
-    - role: upgrade
+    - role: k3s_upgrade