feat: move system-upgrade-controller to addons

Signed-off-by: Devin Buhl <devin@buhl.casa>

bootstrap/tasks/addons/main.yaml

@@ -20,6 +20,10 @@
   when: kube_prometheus_stack.enabled | default(false)
   ansible.builtin.include_tasks: kube_prometheus_stack.yaml
 
+- name: Process addon system-upgrade-controller
+  when: system_upgrade_controller.enabled | default(false)
+  ansible.builtin.include_tasks: system_upgrade_controller.yaml
+
 - name: Process addon weave-gitops
   when: weave_gitops.enabled | default(false)
   ansible.builtin.include_tasks: weave_gitops.yaml