Support chat history persistence in AutoGPT (#5716)

**Short Description**
Added a new argument to AutoGPT class which allows to persist the chat
history to a file.

**Changes**
1. Removed the `self.full_message_history: List[BaseMessage] = []`
2. Replaced it with `chat_history_memory` which can take any subclasses
of `BaseChatMessageHistory`

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Co-authored-by: Harrison Chase <[email protected]>

Author: alonroth