Provide option to not automatically uninstall on failed install.

[Anand Parthasarathi]

When a helmRelease fails to install successfully, helmOperator currently automatically deletes. That may not be desirable and may want to keep the helmChart for inspection before deleting it. Providing an option in the HelmRelease to configure this behavior will be great.

[Stefan Prodan]

Such an option exists in Flux2 helm-controller, docs here https://toolkit.fluxcd.io/components/helm/helmreleases/#configuring-failure-remediation

TLDR:

apiVersion: helm.fluxcd.io/v2beta1
kind: HelmRelease
spec:
  install:
      remediateLastFailure: false