Only ask for network name in CI input

[masih]

Instead of asking for lotus_install_network and lotus_deploy_network, simply ask for network name and infer the other one.

Look at example here, where we only ask the network name, then infer deploy network from it.

This simplifies the UX and avoids error-prone input.

Note the typed GitHub Actions input (i.e. drop-down menu instead of textual input of network name).