[5.0] Benchmark BLS host functions

[linh2931]

Add benchmarking of BLS host functions into Leap Benchmark suites. Those host functions are directly benchmarked without using CDT wrappers.

Use benchmark/benchmark -f bls to benchmark. A sample result looks like

function                    runs        average       minimum       maximum

bls:
bls_g1_add                  1,000       2,736 ns       2,607 ns      10,048 ns
bls_g2_add                  1,000       6,766 ns       6,461 ns      13,983 ns
bls_g1_mul                  1,000     193,676 ns     191,533 ns     204,904 ns
bls_g2_mul                  1,000     486,744 ns     480,722 ns     516,755 ns
bls_pairing 1 pair          1,000   1,284,147 ns   1,263,355 ns   1,521,806 ns
bls_pairing 3 pairs         1,000   2,095,239 ns   2,060,983 ns   2,448,659 ns
bls_g1_exp 1 point          1,000     491,239 ns     485,616 ns     626,591 ns
bls_g1_exp 3 points         1,000     698,879 ns     692,786 ns     741,049 ns
bls_g2_exp 1 point          1,000   1,239,919 ns   1,229,475 ns   1,559,680 ns
bls_g2_exp 3 points         1,000   1,841,482 ns   1,821,692 ns   2,167,092 ns
bls_g1_map                  1,000     297,041 ns     291,710 ns     310,379 ns
bls_g2_map                  1,000     380,135 ns     374,088 ns     438,751 ns
bls_fp_mod                  1,000         764 ns         668 ns       7,571 ns

Resolves #1854

[spoonincode]

We don't need to fix this now (or even when merging to main) but we should try to avoid these sort of declarations. We probably want a target similar to eosio_testing_contracts,

leap/libraries/testing/CMakeLists.txt

Lines 39 to 41 in 581cd2b

	configure_file(contracts.hpp.in include/testing_contracts/contracts.hpp ESCAPE_QUOTES)
	add_library(eosio_testing_contracts INTERFACE)
	target_include_directories(eosio_testing_contracts INTERFACE ${CMAKE_CURRENT_BINARY_DIR}/include/testing_contracts)

[linh2931]

Thanks @spoonincode. I was doing the cleos set code issue yesterday and not getting around with this. As the PR has already merged into 5.0, for cleaner tracking, I will merge the PR to main as is, and use your suggested way later.