feat: gasless dnssec ccip support

[stanleyjzheng]

What was wrong?

Gasless DNSSEC was unsupported; eg.

from web3 import Web3, HTTPProvider
w3 = Web3(HTTPProvider("https://cloudflare-eth.com/"))

w3.ens.address("gregskril.com")

resulted in web3.exceptions.MultipleFailedRequests: Offchain lookup failed for supplied urls.

How was it fixed?

Copied the CCIP handler from ENS's Rust implementation here

Apologies, I couldn't figure out how to correctly mock tests since I couldn't find a suitable sequences of tx's for async_ens_setup. But the above snippet works.

Todo:

• Add entry to the release notes

Cute Animal Picture