[InternLM] Add support for InternLM

[Rocketknight1]

InternLM is based on the LLaMA code but adds a config.bias parameter. We can support those models by adding config.bias to LLaMA, and preserve backward compatibility by defaulting it to False

[HuggingFaceDocBuilderDev]

The documentation is not available anymore as the PR was closed or merged.

[ArthurZucker]

Thanks! Quick question, do they use dropout after attention?
Let's also add a InternLM.md, add it to the doc etc 😉

[Rocketknight1]

@ArthurZucker Also, to answer the question, there is no Dropout anywhere in the LLaMA code or the InternLM code.