Add support for UltraStarknetHonk flavour using Staknet Poseidon hash #11489
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…s to write glue code
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Adds a
ultra_starknet_flavour, forked from the ultra_keccak_flavour.This was tested with bb 0.61 with a reference corresponding implementation of the transcript in python similar to the keccak one.
See generic proof -> Transcript implementation https://github.com/keep-starknet-strange/garaga/blob/f5921e0f7e69f474ee0a88b6ecfb52252fc7cc3d/hydra/garaga/precompiled_circuits/honk.py#L526
https://github.com/keep-starknet-strange/garaga/blob/f5921e0f7e69f474ee0a88b6ecfb52252fc7cc3d/hydra/garaga/precompiled_circuits/honk.py#L448-L501
The Starknet poseidon hash was imported from the reference implementation from CryptoExperts (used in production in Starkware STONE prover) https://github.com/CryptoExperts/poseidon