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/longhorn-system/namespace.yaml.j2

@@ -1,4 +1,3 @@
-#% if bootstrap_distribution in ['k0s', 'k3s'] and addon_longhorn.enabled %#
 ---
 apiVersion: v1
 kind: Namespace
@@ -6,4 +5,3 @@ metadata:
   name: longhorn-system
   labels:
     kustomize.toolkit.fluxcd.io/prune: disabled
-#% endif %#