Upgrade the helm controller version to v2

Currently, the code is relying on the v2beta1 version of the helm-controller lib. However

• The sylva cli is relying on v2 version. See

>  k get crd helmreleases.helm.toolkit.fluxcd.io -o yaml | yq .spec.versions | grep v2

name: v2
deprecationWarning: v2beta1 HelmRelease is deprecated, upgrade to v2
name: v2beta1
  Note: this field is provisional to the v2 API, and not actively used
  by v2beta1 HelmReleases.
deprecationWarning: v2beta2 HelmRelease is deprecated, upgrade to v2
name: v2beta2
  Note: this field is provisional to the v2 API, and not actively used
  by v2beta2 HelmReleases.

• The v2beta1 version is v0.37.4, which is more than a year old.

Therefore, the purpose of this issue is to upgrade the lib to the most recent one. In addition, upgrade accordingly the crd file for testing like !234 (closed)