Support resolving Helm charts through local repositories

Right now, the Artifactory Helm repository support requires you to go through a virtual repository to resolve helm charts. This is a pain point when trying to support multiple Helm repositories, as there is no native namespacing feature and subfolders are not supported for the chart name when performing an install through helm. You end up with conflicting packages in multiple repositories and a subpar experience,.

If Artifactory supported resolution through locals, we can skip the virtual and simply have a user point to the local, since Helm allows you to easily add multiple channels.