chore: Isthmus Withdrawals Root

[refcell]

Description

Updates kona's stateless block executor to set the withdrawals root to the L2 to L1 message passer account when isthmus is active.

Specs: https://specs.optimism.io/protocol/isthmus/exec-engine.html#l2tol1messagepasser-storage-root-in-header

[refcell]

📚 $\text{Stack Overview}$

Pulls submitted in this stack:

• chore: Isthmus Withdrawals Root #881 👈
• main

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[codecov]

Codecov Report

Attention: Patch coverage is 47.36842% with 10 lines in your changes missing coverage. Please review.

Project coverage is 90.6%. Comparing base (3ad8e4d) to head (ffd9a5a).
Report is 1 commits behind head on main.

✅ All tests successful. No failed tests found.

Files with missing lines	Patch %	Lines
crates/executor/src/executor/mod.rs	47.3%	10 Missing ⚠️

Additional details and impacted files

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