Add support for __all__ and potentilly deleting functions

[ArthurZucker]

What does this PR do?

Adds support in modular for:

• deleting super()'s function (with raise Attribute Error)
• a way to call another super: if you inherit from both LlamaTokenier and PretrainedTokenizer, you can call PretrainedTokenizer's __init__ and it will be unravelled as super().__init__()
• splitting the all that is created in the modular_xxx.py
• camel-cased renaming when dependencies are not found

[HuggingFaceDocBuilderDev]

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[HuggingFaceDocBuilderDev]

The docs for this PR live here. All of your documentation changes will be reflected on that endpoint. The docs are available until 30 days after the last update.

[LysandreJik]

Looks good! Only left a few comments