Prepare Holocene testnet & devnet release

[sebastianst]

Follow-up to ethereum-optimism/superchain-registry#677 and ethereum-optimism/op-geth#429

• Sepolia devnets (only Base & OP): Fri Nov 15 15:00:00 UTC 2024, unix ts 1731682800, this Friday
• Sepolia testnets: Tue Nov 26 15:00:00 UTC 2024, unix ts 1732633200, Tuesday in 2 weeks.

[codecov]

Codecov Report

All modified and coverable lines are covered by tests ✅

Project coverage is 66.77%. Comparing base (2acb497) to head (9898ff1).
Report is 1 commits behind head on develop.

Additional details and impacted files

@@             Coverage Diff             @@
##           develop   #12917      +/-   ##
===========================================
- Coverage    68.78%   66.77%   -2.02%     
===========================================
  Files           56       56              
  Lines         4665     4665              
===========================================
- Hits          3209     3115      -94     
- Misses        1274     1378     +104     
+ Partials       182      172      -10     

Flag	Coverage Δ
cannon-go-tests-32	61.81% <ø> (-2.02%)	⬇️
cannon-go-tests-64	56.38% <ø> (-1.66%)	⬇️

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see 8 files with indirect coverage changes

[axelKingsley]

PTAL at the timestamps I pulled from the PR to confirm they are what you intend, thanks :).