build: Move RLP and structs encoding to testutils

[chfast]

No description provided.

[codecov]

Codecov Report

✅ All modified and coverable lines are covered by tests.
✅ Project coverage is 81.37%. Comparing base (aadd5ff) to head (004e7d1).
⚠️ Report is 1 commits behind head on master.

Additional details and impacted files

@@            Coverage Diff             @@
##           master    #1386      +/-   ##
==========================================
- Coverage   81.45%   81.37%   -0.09%     
==========================================
  Files         151      151              
  Lines       13367    13367              
  Branches     3191     3191              
==========================================
- Hits        10888    10877      -11     
- Misses        337      346       +9     
- Partials     2142     2144       +2     

Flag	Coverage Δ
eest-develop	90.27% <ø> (-0.17%)	⬇️
eest-develop-gmp	22.53% <0.00%> (ø)
eest-legacy	15.58% <100.00%> (ø)
eest-legacy-silkpre	24.83% <0.00%> (ø)
evmone-unittests	75.95% <100.00%> (ø)

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

Components	Coverage Δ
core	94.07% <ø> (-0.11%)	⬇️
tooling	83.43% <100.00%> (+0.12%)	⬆️
tests	73.12% <ø> (ø)

Files with missing lines	Coverage Δ
test/blockchaintest/blockchaintest_runner.cpp	76.03% <ø> (ø)
test/state/block.cpp	100.00% <ø> (ø)
test/state/block.hpp	100.00% <ø> (ø)
test/state/transaction.hpp	100.00% <ø> (ø)
test/statetest/statetest_runner.cpp	71.87% <ø> (ø)
test/t8n/t8n.cpp	71.42% <ø> (ø)
test/unittests/state_mpt_hash_test.cpp	92.24% <ø> (ø)
test/unittests/state_mpt_test.cpp	90.87% <ø> (ø)
test/unittests/state_new_account_address_test.cpp	59.13% <ø> (ø)
test/unittests/state_rlp_test.cpp	82.05% <ø> (ø)
... and 5 more

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