implement tentative mainnet TTD

[garyschulte]

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PR description

Draft until after ACD call on 2022-11-18

https://github.com/ethereum/execution-specs/pull/585

Fixed Issue(s)

Documentation

• [ ] I thought about documentation and added the doc-change-required label to this PR if updates are required.

Changelog

• [ ] I thought about the changelog and included a changelog update if required.