Add support to contract deployment in Zksync Era - `Failed to serialize transaction: toAddressIsNull` when deploying on ZkSync Era`

[seaona]

Description

We need to fix the test dapp so it enables deploying contracts in zkSync Era. At the moment we get the error:

Failed to serialize transaction: toAddressIsNull when deploying on ZkSync Era`

contract-deploy-zksync.mp4