Add HA option, change to yaml inventory, cleanup

- HA option for multiple server nodes using embedded etcd
- Switch to yaml inventory file for easier editing and combining vars
- Update to full ansible module names
- Change master/node names to server/agent
- Cleanup small linting errors
- Add reboot playbook which staggers reboot to keep HA cluster up
- Move playbooks to playbook directory

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

roles/reset/tasks/main.yml

@@ -8,8 +8,9 @@
   with_items:
     - k3s
     - k3s-node
+    - k3s-init
 
-- name: Pkill k3s container runtimes"
+- name: Kill container shim
   register: pkill_containerd_shim_runc
   ansible.builtin.command: pkill -9 -f "k3s/data/[^/]+/bin/containerd-shim-runc"
   changed_when: "pkill_containerd_shim_runc.rc == 0"
@@ -37,6 +38,6 @@
     - /var/lib/kubelet
     - /var/lib/rancher/k3s
 
-- name: Daemon_reload
+- name: Systemd daemon reload
   ansible.builtin.systemd:
     daemon_reload: yes