Add another Ethereum client

[fredo]

Parity is most likely slowly deprecating. We should add at least one other client.

In the future we should aim to support all clients (maybe having a blacklist of not supported clients).

Daily CI testing can be done on only 1 or 2 clients and having a weekly testbench to test against a wider range of clients.

• Setup Nethermind for Goerli
• Extend integration tests to use Nethermind

depends on: #7210

[karlb]

We at least support nitro for Arbitrum now.