bls: Add bls mul and msm benchmark tests for long inputs

[rodiazet]

• Implements bls msm and mul test input generator.
• Add bls msm and mulbenchmarks

[codecov]

Codecov Report

Attention: Patch coverage is 0% with 33 lines in your changes missing coverage. Please review.

Project coverage is 94.02%. Comparing base (8e4a055) to head (164d167).

Files with missing lines	Patch %	Lines
test/precompiles_bench/bls_bench_input.cpp	0.00%	22 Missing ⚠️
test/precompiles_bench/precompiles_bench.cpp	0.00%	11 Missing ⚠️

Additional details and impacted files

@@            Coverage Diff             @@
##           master    #1045      +/-   ##
==========================================
- Coverage   94.21%   94.02%   -0.19%     
==========================================
  Files         153      154       +1     
  Lines       15934    15966      +32     
==========================================
  Hits        15012    15012              
- Misses        922      954      +32     

Flag	Coverage Δ
eof_execution_spec_tests	17.50% <0.00%> (-0.04%)	⬇️
ethereum_tests	27.29% <0.00%> (-0.06%)	⬇️
ethereum_tests_silkpre	19.11% <0.00%> (-0.04%)	⬇️
execution_spec_tests	20.41% <0.00%> (-0.05%)	⬇️
unittests	88.83% <0.00%> (-0.18%)	⬇️

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Files with missing lines	Coverage Δ
test/precompiles_bench/precompiles_bench.cpp	0.00% <0.00%> (ø)
test/precompiles_bench/bls_bench_input.cpp	0.00% <0.00%> (ø)