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/ks.yaml.j2

@@ -1,4 +1,4 @@
-{% if bootstrap_distribution == "k3s" and system_upgrade_controller.enabled | default(false) %}
+<% if bootstrap_distribution == "k3s" and system_upgrade_controller.enabled | default(false) %>
 ---
 apiVersion: kustomize.toolkit.fluxcd.io/v1
 kind: Kustomization
@@ -41,4 +41,4 @@ spec:
   interval: 30m
   retryInterval: 1m
   timeout: 5m
-{% endif %}
+<% endif %>