feat: replace ansible templating with makejinja (#1156)

bootstrap/templates/kubernetes/apps/observability/kube-prometheus-stack/ks.yaml.j2

@@ -0,0 +1,22 @@
+{% if kube_prometheus_stack.enabled | default(false) %}
+---
+apiVersion: kustomize.toolkit.fluxcd.io/v1
+kind: Kustomization
+metadata:
+  name: &app kube-prometheus-stack
+  namespace: flux-system
+spec:
+  targetNamespace: observability
+  commonMetadata:
+    labels:
+      app.kubernetes.io/name: *app
+  path: ./kubernetes/apps/observability/kube-prometheus-stack/app
+  prune: true
+  sourceRef:
+    kind: GitRepository
+    name: home-kubernetes
+  wait: false
+  interval: 30m
+  retryInterval: 1m
+  timeout: 5m
+{% endif %}