refactor(ethexe/ethereum): add builder pattern for `Ethereum` & `EthereumDeployer`

[StackOverflowExcept1on]

File Location(s)

ethexe/ethereum/src/lib.rs
ethexe/ethereum/src/deploy.rs

Proposal

Use the builder pattern for Ethereum and EthereumDeployer, avoid creating EthereumDeployer from AlloyProvider (because it's bad architecture)