Get the contract deployment address from a DeploySentTx directly

[spalladino]

As a user, you shouldn't need to keep the deployMethod around just to get the deployment address. Maybe we should inject it into yarn-project/aztec.js/src/contract_deployer/deploy_sent_tx.ts so you can query it from the tx object directly?

Originally posted by @spalladino in #2818 (comment)

There after, also add to docs!

[rahul-kothari]

actually looks like phil already made the change in the very same PR!