feat: add op-erigon

[mininny]

Resolves #12

This PR adds op-erigon to the list of execution clients for optimism protocol.
Most of the configuration is same as op-geth and op-reth, except for erigon run flags and op-erigon's docker image.

[barnabasbusa]

Could you please rebase the latest main branch changes?

[barnabasbusa]

I could help you finishing up this PR if you enable write access by maintainers. Currently I can't push to your PR.

[barnabasbusa]

Looks like you have tried to reuse the erigon flags, instead of op-erigon flags.
some ws related flags don't' seem to exist in op-erigon, but they exist in erigon.

        "--ws.addr=0.0.0.0",
        "--ws.api=admin,engine,net,eth,web3,debug",
        "--ws.origins=*",
        "--discovery.port={0}".format(discovery_port),

[barnabasbusa]

Closing in favor of #38

[mininny]

I could help you finishing up this PR if you enable write access by maintainers. Currently I can't push to your PR.

I'm sorry, I didn't have time today to work on this. I was trying to give you access, but it seems like "Allow edits by maintainers" doesn't seem to be enabled because of this issue: https://github.com/orgs/community/discussions/5634. Thanks for the new pr!