[aptos-faucet] Print out the endpoint running the faucet on stdout

[gregnazario]

Description

Print out the faucet address and port so we can tell in local testnet mode of the CLI

Test Plan

$ target/debug/aptos node run-local-testnet --with-faucet --assume-yes --force-restart
Completed generating configuration:
        Log file: "/Users/greg/.aptos/testnet/validator.log"
        Test dir: "/Users/greg/.aptos/testnet"
        Aptos root key path: "/Users/greg/.aptos/testnet/mint.key"
        Waypoint: 0:d302c6b10e0fa68bfec9cdb383f24ef1189d8850d50b832365eea21ae52d8101
        ChainId: TESTING
        REST API endpoint: 0.0.0.0:8080
        FullNode network: /ip4/0.0.0.0/tcp/6181

Aptos is running, press ctrl-c to exit

Faucet started on 0.0.0.0:8081

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