test: move cow shed signature from hook dapps side to cowswap

[jean-neiverth]

Summary

This PR drafts a solution to no longer require CoW Shed signatures on adding hooks. The idea is to override CoW Shed contract bytecode using Tenderly state_objects

To Test

1. Go to /#/8453/swap/hooks
2. Fill a swap order
3. Add a transfer post-hook and fill address and amount
4. Notice that, when clicking on add hook, no CoW Shed signature will be requested (yet approvals / permits will still be)
5. After adding the hook, notice the simulation will run even without CoW Shed signature

Background

This PR is a POC for one of the solutions proposed in Hooks V2 proposal to CoW