Support for non git-based helm repo

[loadstar81]

Given a PR with an update like the following:

  sources:
  - repoURL: https://kubernetes.github.io/autoscaler
    chart: cluster-autoscaler
-   targetRevision: 9.43.1
+   targetRevision: 9.43.2
    helm:
      valuesObject:
        image:
          tag: v1.30.2

kubechecks attempts a git clone which then fails with:

ERR unable to clone repository, Cloning into '/tmp/kubechecks-repo-227208146'...                                                                                           
fatal: repository 'https://kubernetes.github.io/autoscaler/' not found                                                                                                             
error="exit status 128"

I noticed this behavior was mentioned here but not certain if this is a bug or just not supported.

[djeebus]

Ah, nope, I suspect that this is still not supported. Something worth adding though!