*: Use upstream multiaddr crate

[mxinden]

The history of the local multiaddr is that we just cloned the existing code in this repo for the sake of moving quickly.

Now that things have stabilized, we should backport changes to the upstream repository.

Fixes #758. Blocked on multiformats/rust-multiaddr#40.

[mxinden]

@vmx do you have some spare cycles to give this a review?

[vmx]

I've only checked the changes lines, so if there e.g. was a workspace internal package that wasn't updated properly i wouldn't catch it (though I guess the CI would).

[mxinden]

I've only checked the changes lines, so if there e.g. was a workspace internal package that wasn't updated properly i wouldn't catch it (though I guess the CI would).

👍 thanks Volker!