ChatGoogleGenerativeAI parameters are inconsistent with other llm provides

[AmgadHasan]

Hi.

For the ChatGoogleGenerativeAI, we pass the following paramters:

 chat = ChatGoogleGenerativeAI(
        google_api_key=api_key,
        max_tokens=max_tokens,
        model=model,
    )

However, for openai and antrhopic, we use model_name and not model:

 chat = ChatAnthropic(
        temperature=0,
        anthropic_api_key=api_key,
        model_name=model,
    )
 chat = ChatOpenAI(
        openai_api_key=api_key,
        max_tokens=max_tokens,
        model_name=model,
    )

Can we make the interface of chat objects consistent across providers?
We can add a parameter model_name and deprecate model going forward.

[AmgadHasan]

There is already a pr that can solve this:
#81