t8n: Add withdrawalsRoot to result

[danceratopz]

Adds withdrawalsRoot to evmone-t8n's output result.

When evmone-t8n support was initially added to ethereum/execution-spec-tests, the framework didn't verify all block header fields. This was subsequently added in ethereum/execution-spec-tests#217, which causes test cases executed for fork=Shanghai to fail with evmone-t8n. This PR remedies the fails by adding the withdrawalsRoot to t8n's output.

With this PR, all tests pass against ethereum/execution-spec-tests@af3d64f and the withdrawalsRoot matches that of geth 1.12.2-stable-bed84606.

[codecov]

Codecov Report

Merging #693 (424c094) into master (35f4141) will decrease coverage by 0.11%.
The diff coverage is 33.33%.

Additional details and impacted files

@@            Coverage Diff             @@
##           master     #693      +/-   ##
==========================================
- Coverage   97.53%   97.42%   -0.11%     
==========================================
  Files          86       86              
  Lines        8236     8246      +10     
==========================================
+ Hits         8033     8034       +1     
- Misses        203      212       +9     

Flag	Coverage Δ
blockchaintests	62.71% <ø> (ø)
statetests	73.61% <0.00%> (-0.33%)	⬇️
statetests-silkpre	23.15% <0.00%> (-0.04%)	⬇️
unittests	95.03% <33.33%> (-0.10%)	⬇️

Flags with carried forward coverage won't be shown. Click here to find out more.

Files Changed	Coverage Δ
test/state/mpt_hash.cpp	76.47% <0.00%> (-23.53%)	⬇️
test/state/state.hpp	100.00% <ø> (ø)
test/statetest/statetest_loader.cpp	90.25% <100.00%> (+0.08%)	⬆️
test/unittests/state_transition_block_test.cpp	100.00% <100.00%> (ø)

... and 1 file with indirect coverage changes

[rodiazet]

It's done already in #690
It's going to be merged soon.

[danceratopz]

Great, thanks! Ran #690:

• All tests pass against ethereum/execution-spec-tests@af3d64f
• All generated withdrawalsRoot values match those of geth 1.12.2-stable-bed84606.

[rodiazet]

@danceratopz It's in master now