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/grafana/app/secret.sops.yaml.j2

@@ -1,4 +1,3 @@
-#% if addon_grafana.enabled %#
 ---
 apiVersion: v1
 kind: Secret
@@ -7,4 +6,3 @@ metadata:
 stringData:
   admin-user: admin
   admin-password: "#{ grafana.password }#"
-#% endif %#