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/observability/kubernetes-dashboard/app/rbac.yaml.j2

@@ -1,4 +1,3 @@
-#% if addon_kubernetes_dashboard.enabled %#
 # For dashboard sign in token:
 # kubectl -n observability get secret kubernetes-dashboard -o jsonpath='{.data.token}' | base64 -d
 ---
@@ -38,4 +37,3 @@ subjects:
   - kind: ServiceAccount
     name: kubernetes-dashboard
     namespace: observability
-#% endif %#