Function add_faucet

pub fn add_faucet(
    install_options: AddFaucetServiceOptions,
    node_registry: &mut NodeRegistry,
    service_control: &dyn ServiceControl,
    verbosity: VerbosityLevel,
) -> Result<()>

Install the faucet as a service.

This only defines the service; it does not start it.

There are several arguments that probably seem like they could be handled within the function, but they enable more controlled unit testing.