Fix config propagation in AgentExecutor

[aroun-coumar]

This PR is a fix for the bug mentioned in 33080

[aroun-coumar]

@baskaryan I am not aware who maintains this repo , please add a reviewer for this fix

[eyurtsev]

@aroun-coumar you'll need to rebase against as langchain is now in langchain-classic.

We can review this PR. I think there have been previous attempts to make this fix, but those were wrong. AgentExecutor was introduced before there was a concept of a config, and I think that there was no easy way to accommodate it. We're recommending that most users change to the langchain prebuilt agent.

https://docs.langchain.com/oss/python/langchain/overview -- this is avaliable as part of the alpha release, and will be available officialy as part of the 1.0 release

[aroun-coumar]

Hi @eyurtsev , I have rebased my codebase as suggested, i got few failing checks in CI which i would resolve ASAP (any support welcomed)

I locally tested my changes and now the config is passed correctly for both cases mentioned in the bug,
Please feel free to review the code.

[aroun-coumar]

Since i changed the signature of _call and _acall in base.py we may have to change(add config param) all those files which uses _call and _acall in chain