evmmax: Implement modexp

[rodiazet]

This PR implements expmod precompile using EVMMAX C++ API. The implementation restricts input sizes upper limit to 1024 bytes.

[codecov]

Codecov Report

Attention: Patch coverage is 98.95288% with 2 lines in your changes missing coverage. Please review.

Project coverage is 94.45%. Comparing base (d62977d) to head (8ddff48).

Files with missing lines	Patch %	Lines
test/state/precompiles.cpp	90.47%	2 Missing ⚠️

Additional details and impacted files

@@            Coverage Diff             @@
##           master    #1135      +/-   ##
==========================================
- Coverage   94.50%   94.45%   -0.06%     
==========================================
  Files         167      168       +1     
  Lines       18202    18037     -165     
==========================================
- Hits        17201    17036     -165     
  Misses       1001     1001              

Flag	Coverage Δ
eof_execution_spec_tests	15.48% <0.00%> (+0.13%)	⬆️
ethereum_tests	27.21% <57.06%> (-1.11%)	⬇️
ethereum_tests_silkpre	21.13% <0.00%> (+0.30%)	⬆️
execution_spec_tests	19.95% <39.79%> (-1.14%)	⬇️
unittests	91.47% <83.76%> (+1.70%)	⬆️

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

Files with missing lines	Coverage Δ
lib/evmone_precompiles/modexp.cpp	100.00% <100.00%> (ø)
test/unittests/evmmax_modexp.cpp	100.00% <100.00%> (ø)
test/state/precompiles.cpp	98.40% <90.47%> (-0.58%)	⬇️