fix: isthmus e2e test utils and withdrawal root fix

[meyer9]

Description

Adds e2e test utils for Isthmus and fixes a bug where the WithdrawalRoot is not passed along between GetPayload and NewPayload which makes it impossible to build Isthmus blocks.

[codecov]

Codecov Report

Attention: Patch coverage is 0% with 1 line in your changes missing coverage. Please review.

Project coverage is 46.67%. Comparing base (b8c011f) to head (4af4468).
Report is 7 commits behind head on develop.

Files with missing lines	Patch %	Lines
op-node/rollup/superchain.go	0.00%	1 Missing ⚠️

Additional details and impacted files

@@             Coverage Diff             @@
##           develop   #13933      +/-   ##
===========================================
- Coverage    46.91%   46.67%   -0.24%     
===========================================
  Files          973      973              
  Lines        80957    80958       +1     
  Branches       770      770              
===========================================
- Hits         37979    37787     -192     
- Misses       40026    40260     +234     
+ Partials      2952     2911      -41     

Flag	Coverage Δ
cannon-go-tests-32	61.99% <ø> (ø)
cannon-go-tests-64	56.62% <ø> (ø)
contracts-bedrock-tests	88.33% <ø> (-2.79%)	⬇️

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Files with missing lines	Coverage Δ
op-service/eth/types.go	30.73% <ø> (ø)
op-node/rollup/superchain.go	0.00% <0.00%> (ø)

... and 32 files with indirect coverage changes

[meyer9]

Closing in favor of #13973