Enable drift detection for cluster HelmRelease

When working on !2445 (merged), it was noticed that when we are enabling flux drift detection and correction for cluster HR, it is causing the rolling upgrade of the nodes.

For this reason, we haven't drift detection on cluster HelmRelease yet.

Every 2.0s: kubectl get machines -A                                                                                                                                                              ishita-drift: Mon Oct 28 12:11:34 2024

NAMESPACE      NAME                                     CLUSTER              NODENAME                                 PROVIDERID                                          PHASE      AGE     VERSION
sylva-system   management-cluster-control-plane-6c8mf   management-cluster   management-cluster-cp-61aef040e0-s7mqc   openstack:///7212c9ff-a28f-4114-bc96-eeff4bd24fee   Deleting   9m9s    v1.29.9+rke2r1
sylva-system   management-cluster-control-plane-7wzbs   management-cluster   management-cluster-cp-61aef040e0-9686l   openstack:///72dab693-0223-42cd-8c24-33db70854a81   Running    3m35s   v1.29.9+rke2r1
sylva-system   management-cluster-control-plane-b9z7n   management-cluster   management-cluster-cp-61aef040e0-qdgbj   openstack:///b520cb3c-fb4b-4429-b96a-a3798a71e028   Running    9m9s    v1.29.9+rke2r1
sylva-system   management-cluster-control-plane-jwdtj   management-cluster   management-cluster-cp-61aef040e0-5h5p4   openstack:///acfbaf82-741c-4b0f-af2e-42424152fe3a   Running    9m8s    v1.29.9+rke2r1
sylva-system   management-cluster-md0-79stb-mpk6r       management-cluster   management-cluster-md0-79stb-mpk6r       openstack:///9636ac69-c0bf-4bf4-844e-956046ac7ebb   Running    6m13s   v1.29.9+rke2r1

This happens because we are getting the following diff for cluster trigger a rolling upgrade of the nodes:

{
  "level": "debug",
  "ts": "2024-10-30T09:18:14.195Z",
  "msg": "resource modified",
  "controller": "helmrelease",
  "controllerGroup": "helm.toolkit.fluxcd.io",
  "controllerKind": "HelmRelease",
  "HelmRelease": {
    "name": "cluster",
    "namespace": "sylva-system"
  },
  "namespace": "sylva-system",
  "name": "cluster",
  "reconcileID": "c52825f1-2299-4a26-a77e-be4baff9a610",
  "resource": "RKE2ControlPlane/sylva-system/management-cluster-control-plane",
  "patch": [
    {
      "value": "HTTP_PROXY=<http_proxy>",
      "op": "replace",
      "path": "/spec/files/9/content"
    },
    {
      "value": "HTTP_PROXY=<https_proxy>",
      "op": "replace",
      "path": "/spec/files/10/content"
    },
    {
      "value": "export NO_PROXY=<no_proxy>",
      "op": "replace",
      "path": "/spec/preRKE2Commands/4"
    }
  ]
}

So for the time being, drift has been disabled for cluster HR.

We need to work to fix this behavior and enable drift detection for cluster HR.