Jetstream: Unable to proxy request with no auth

[richard-cox]

• Use case - proxy helm hub requests (see baseHandleMonocularInstance)
• We should be able to use the standard request process which goes through doRequest, however the actual forwarded request is handled by the 'authHandler' associated with the endpoint OR defaults to an OAuth request. For this case there's no auth at all so falls over.
• Think we just need some kind of no auth auth provider that makes a plain http request

[richard-cox]

Once this is done, the process to fetched all charts in helm.effect could then be updated to make a standard proxy request to all helm endpoints not of repo type