feat: remove the need for raw jinja blocks (#1158)

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

bootstrap/templates/kubernetes/apps/tools/system-upgrade-controller/plans/kustomization.yaml.j2

@@ -1,8 +1,8 @@
-{% if bootstrap_distribution == "k3s" and system_upgrade_controller.enabled | default(false) %}
+<% if bootstrap_distribution == "k3s" and system_upgrade_controller.enabled | default(false) %>
 ---
 apiVersion: kustomize.config.k8s.io/v1beta1
 kind: Kustomization
 resources:
   - ./server.yaml
   - ./agent.yaml
-{% endif %}
+<% endif %>