bug: estimate_tx_dependencies doesn't work for logging of external contracts

[iqdecay]

This code works:

    let expected_logs: Vec<String> = vec![
        format!("{:?}", 64),
        format!("{:?}", 32),
        format!("{:?}", 16),
        format!("{:?}", 8),
    ];

    let logs = contract_caller_instance
        .methods()
        .logs_from_external_contract(contract_id)
        .set_contracts(&[contract_instance])
        .call()
        .await?
        .get_logs()?;

    assert_eq!(expected_logs, logs);

but this one doesn't:

    let logs = contract_caller_instance
        .methods()
        .logs_from_external_contract(contract_id)
        .estimate_tx_dependencies(None)
        .await?
        .call()
        .await?
        .get_logs()?;

    assert_eq!(expected_logs, logs);

As a user, I would expect estimate_tx_dependencies to estimate the logging dependencies for me. It is not the case.
This is because the estimate_tx_dependencies doesn't use the set_contracts method. The fix is not trivial: we would need the estimate_tx_dependencies method to have access to the abigen so the log_decoder can be instantiated.

[iqdecay]

One possible solution would be to provide the path to the contract binaries when you want estimate_tx_dependencies to work with logging. And then the function would call the abigens and instantiate the contracts for you. A problem to know which bin path corresponds to which contract_id remains. This might turn out to be too dirty and annoying compared to just letting the user manage logging themselves though.