feat: implement mjfilter file for templates (#1244)

* feat: implement mjfilter file for templates

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

* fix: use data.get in mjfilters

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

---------

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

bootstrap/templates/kubernetes/apps/tools/system-upgrade-controller/app/helmrelease.yaml.j2

@@ -1,4 +1,3 @@
-#% if bootstrap_distribution in ['k3s'] and addon_system_upgrade_controller.enabled %#
 ---
 apiVersion: helm.toolkit.fluxcd.io/v2beta2
 kind: HelmRelease
@@ -102,4 +101,3 @@ spec:
         globalMounts:
           - path: /etc/ca-certificates
             readOnly: true
-#% endif %#