Fix: Pass along kwargs when creating a sql agent

[zachdj]

Currently, agent_toolkits.sql.create_sql_agent() passes kwargs to the ZeroShotAgent that it creates but not to AgentExecutor that it also creates. This prevents the caller from providing some useful arguments like max_iterations and early_stopping_method

This PR changes create_sql_agent so that it passes kwargs to both constructors.

[zachdj]

I saw in #2285 it was preferable to add the desired args to the method signature instead of sending kwargs to two different constructors. Would that be a better approach here as well?

[hwchase17]

I saw in #2285 it was preferable to add the desired args to the method signature instead of sending kwargs to two different constructors. Would that be a better approach here as well?

yes! to avoid confusion about where to pass things

other than that, love this - thanks

[zachdj]

yes! to avoid confusion about where to pass things

Thanks for the quick reply! Done!