refactor to use with argocd instead of flux

cluster/helm/longhorn/longhorn-release.yml

@@ -1,32 +0,0 @@
----
-apiVersion: helm.toolkit.fluxcd.io/v2
-kind: HelmRelease
-metadata:
-  name: longhorn
-  namespace: longhorn-system
-spec:
-  interval: 24h
-  chart:
-    spec:
-      chart: longhorn
-      version: "1.9.0"
-      sourceRef:
-        kind: HelmRepository
-        name: longhorn
-        namespace: flux-system
-      interval: 24h
-  install:
-    createNamespace: true
-  upgrade:
-    remediation:
-      remediateLastFailure: true
-  values:
-    persistence:
-      defaultClass: true
-      reclaimPolicy: Retain
-    ingress:
-      enabled: false
-    service:
-      ui:
-        type: LoadBalancer
-        port: 85