precompiles: Precompute Miller loop lines for KZG trusted setup point

[chfast]

Precompute the Miller-loop lines for the trusted-setup point [s]₂
and use these (instead of the point) for faster KZG pairing check.
The precomputation has been done outside and only the result is stored.
The static data size is ~19 KB.

[codecov]

Codecov Report

✅ All modified and coverable lines are covered by tests.
✅ Project coverage is 96.97%. Comparing base (49f7e65) to head (cffbd87).
⚠️ Report is 1 commits behind head on master.

Additional details and impacted files

@@           Coverage Diff           @@
##           master    #1537   +/-   ##
=======================================
  Coverage   96.97%   96.97%           
=======================================
  Files         162      163    +1     
  Lines       14436    14450   +14     
  Branches     3383     3384    +1     
=======================================
+ Hits        13999    14013   +14     
  Misses        307      307           
  Partials      130      130           

Flag	Coverage Δ
eest-develop	91.93% <100.00%> (+<0.01%)	⬆️
eest-develop-gmp	26.51% <18.75%> (-0.02%)	⬇️
eest-legacy	17.56% <0.00%> (-0.02%)	⬇️
eest-libsecp256k1	28.15% <18.75%> (-0.03%)	⬇️
eest-stable	91.85% <100.00%> (+<0.01%)	⬆️
evmone-unittests	92.63% <100.00%> (+<0.01%)	⬆️

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Components	Coverage Δ
core	96.02% <100.00%> (+<0.01%)	⬆️
tooling	86.71% <ø> (ø)
tests	99.79% <100.00%> (+<0.01%)	⬆️

Files with missing lines	Coverage Δ
lib/evmone_precompiles/kzg.cpp	100.00% <100.00%> (ø)
lib/evmone_precompiles/kzg_setup_g2_1_lines.cpp	100.00% <100.00%> (ø)
test/unittests/precompiles_kzg_test.cpp	100.00% <100.00%> (ø)

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Pull request overview

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test/unittests/precompiles_kzg_test.cpp:12

• std::memcmp is used in this test, but <cstring> is not included. Relying on indirect includes can break builds depending on toolchain/standard library; add #include <cstring> (or <string.h>) near the other includes.

#include <evmc/evmc.hpp>
#include <evmone_precompiles/kzg.hpp>
#include <evmone_precompiles/kzg_setup_g2_1_lines.hpp>
#include <evmone_precompiles/sha256.hpp>
#include <gtest/gtest.h>
#include <intx/intx.hpp>
#include <span>

[chfast]

                                                           │ /proc/self/fd/11 │          /proc/self/fd/16          │
                                                           │      gas/s       │    gas/s     vs base               │
precompile<PrecompileId::point_evaluation,_evmone_blst>-14        50.75M ± 0%   54.25M ± 1%  +6.89% (p=0.000 n=11)