(feat): ClusterProfile HelmCharts can be expressed as a template

[gianlucam76]

For instance

apiVersion: config.projectsveltos.io/v1beta1
kind: ClusterProfile
metadata:
  name: deploy-kyverno
spec:
  clusterSelector:
    matchLabels:
      env: fv
  syncMode: Continuous
  helmCharts:
  - repositoryURL:    https://kyverno.github.io/kyverno/
    repositoryName:   kyverno
    chartName:        kyverno/kyverno
    chartVersion:     |-
      {{$version := index .Cluster.metadata.labels "k8s-version" }}{{if eq $version "v1.29.0"}}v3.2.5
      {{else}}v3.2.6
      {{end}}
    releaseName:      kyverno-latest
    releaseNamespace: kyverno
    helmChartAction:  Install

Sveltos will fetch Cluster and use it to instantiate this template before deploying it.

Issue: if Cluster.Labels changes, Sveltos won't redeploy as hash is not changing.

Fixes #794

[gianlucam76]

By default, Sveltos does not react to all Cluster changes but only to some (like Spec.Paused or labels changes).

When the helmChart is expressed as a template and relies on Cluster fields to be instantiated, Cluster needs to be fetched in the templateResoruceRefs section. Doing so Sveltos will react to any change and re-instantiate the ClusterProfile.

apiVersion: config.projectsveltos.io/v1beta1
kind: ClusterProfile
metadata:
  name: deploy-kyverno
spec:
  clusterSelector:
    matchLabels:
      env: fv
  syncMode: Continuous
  templateResourceRefs:
  - resource:
      apiVersion: cluster.x-k8s.io/v1beta1
      kind: Cluster
      name: "{{ .Cluster.metadata.name }}"
    identifier: Cluster
  helmCharts:
  - repositoryURL:    https://kyverno.github.io/kyverno/
    repositoryName:   kyverno
    chartName:        kyverno/kyverno
    chartVersion:     |-
      {{$version := index .Cluster.metadata.labels "k8s-version" }}{{if eq $version "v1.29.0"}}v3.2.5
      {{else}}v3.2.6
      {{end}}
    releaseName:      kyverno-latest
    releaseNamespace: kyverno
    helmChartAction:  Install

If we started with Cluster having label k8s-version: v1.29.0, Sveltos will first deploy Kyverno v3.2.5

Later on if the label is removed or modified, Sveltos reacts to it by upgrading Kyverno to version v3.2.6