Change subnet/blockchain creation order

[felipemadero]

Closes https://github.com/ava-labs/avalanche-cli/issues/1279 With this, subnet deploy will create a subnet id on first execution, and create a blockchain on second execution. In the middle, it is expected for the user to add validators to the subnet. subnet deploy will check for that condition when creating the blockchain.

[sukantoraymond]

Ok so seems that currently with this PR, user is expected to run the deploy command ONCE, call addValidator command, and then call deploy command again -> need to call 3 commands to deploy a subnet in public network.

I think it's better for user experience if we add prompts required for adding Validators in the deploy command so that we can deploy subnet in public network only with 1 command

[sukantoraymond]

Also are we changing the order here? Because seems that we are already creating subnet first and then creating blockchain anyways

[felipemadero]

already implemented in CLI. subnet deploy can be called just to create the subnet, then called again to create a blockchain.