Fix: import multihash (caused by aioipfs)

[1yam]

This PR resolves a dependency conflict caused by two libraries, pymultihash and py-multihash, both of which provide a module named multihash. The conflict arises because:

pymultihash is required by pyaleph and is imported as multihash.
py-multihash is now required by aioipfs.

Self proofreading checklist

• Is my code clear enough and well documented
• Are my files well typed
• New translations have been added or updated if new strings have been introduced in the frontend
• Database migrations file are included
• Are there enough tests
• Documentation has been included (for new feature)

Changes

This pull request includes updates to the src/aleph/toolkit/libp2p_stubs/peer/id.py file to improve compatibility with the multihash library. The changes mainly involve updating import statements and method calls to reflect the latest structure of the multihash library.

Updates to multihash library usage:

• Updated import statements to include multihash.funcs for better organization and clarity.
• Changed multihash.FuncReg.register to multihash.funcs.FuncReg.register in the update method to align with the new library structure.
• Modified the from_pubkey method to use multihash.funcs.Func.sha2_256 and multihash.Multihash.digest to ensure compatibility with the updated multihash library.

How to test

You can try to sync you'r CCN