[Config] Update the 'Getting started with net.box' topic to using a new config

[andreyaksenov]

Epic: #3544

Product: Tarantool
Since: 3.0
Root document: https://www.tarantool.io/en/doc/latest/how-to/getting_started_net_box/
SME: @ Totktonada

Details

Consider creating a new connectors directory inside https://github.com/tarantool/doc/tree/latest/doc/code_snippets/snippets. This directory might contain a single-instance application with sample data and a user with specific privileges used for remote connections (not guest with the super role!).