Is your feature request related to a problem? Please describe.
Users can deploy http and grpc feature servers that wrap get_online_features calls, but currently there is no way to interact with feature servers from python sdk.

Describe the solution you'd like
Add online store types remote-http and remote-grpc (or maybe just call it a remote and differentiate with a url?) that wrap network calls to the respective feature servers. This follows the same pattern as remote registry implementation that wraps calls to the registry server.