op-deployer: Test mainnet deployment

[mslipper]

Adds a unit test for mainnet deployments at version 1.6.0.

[codecov]

Codecov Report

All modified and coverable lines are covered by tests ✅

Project coverage is 66.77%. Comparing base (f94151b) to head (a8db7fc).
Report is 17 commits behind head on develop.

Additional details and impacted files

@@             Coverage Diff             @@
##           develop   #12958      +/-   ##
===========================================
- 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	61.85% <ø> (-2.02%)	⬇️
cannon-go-tests-64	56.72% <ø> (-1.66%)	⬇️

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see 8 files with indirect coverage changes

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