[Feature]: Add safety setting feature for PaLM model

[tikendraw]

The Feature

There is a safety setting in google.generativeai api. Add Add saftey settings as optional parameters to the Palm config class.

Motivation, pitch

To add safety checks.

[motin]

I think this already works and has been working for quite some time. If you add the safety_settings kwarg to the completion() function when using a palm model, it will be forwarded to Palm Config by this line: https://github.com/BerriAI/litellm/blob/d90e04b531692dcb8672909f526c234d0f828595/litellm/llms/palm.py#L119

[krrishdholakia]

closing as this is resolved then?

[krrishdholakia]

Although i do believe we could have better docs on this.

@tikendraw @motin we'd welcome a doc contribution here

[krrishdholakia]

if you can share a working code snippet i can add it to the docs - https://docs.litellm.ai/docs/providers/palm