Lotus fullnode service needs to be configurable

[travisperson]

Currently the fullnode chart does not allow customization of the service and only supports cluster ip for internal communications. For bootstrap nodes or any other node that needs to be dial-able we need to support NodePort / LoadBalancer etc. The current service also exposes the libp2p and api together. I don't think we want to make the current service configurable, but instead add support for an additional service. As a monitoring stack like Prometheus is going to need api access, and any internal tooling will need it as well.