feat: added longhorn addon (#1204)

* added longhorn addon

* enabled longhorn in the tests

* fix: move longhorn to longhorn-system namespace

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

* fix: move longhorn to longhorn-system namespace

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

* fix: move longhorn to longhorn-system namespace

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

* fix: move longhorn to longhorn-system namespace

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

---------

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

bootstrap/templates/kubernetes/apps/longhorn-system/kustomization.yaml.j2

@@ -0,0 +1,8 @@
+#% if longhorn.enabled | default(false) %#
+---
+apiVersion: kustomize.config.k8s.io/v1beta1
+kind: Kustomization
+resources:
+  - ./namespace.yaml
+  - ./longhorn/ks.yaml
+#% endif %#