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fee6f983 - community[minor]: Integration for `Friendli` LLM and `ChatFriendli` ChatModel. (#17913)

community[minor]: Integration for `Friendli` LLM and `ChatFriendli` ChatModel. (#17913) ## Description - Add [Friendli](https://friendli.ai/) integration for `Friendli` LLM and `ChatFriendli` chat model. - Unit tests and integration tests corresponding to this change are added. - Documentations corresponding to this change are added. ## Dependencies - Optional dependency [`friendli-client`](https://pypi.org/project/friendli-client/) package is added only for those who use `Frienldi` or `ChatFriendli` model. ## Twitter handle - https://twitter.com/friendliai