chore: Move all benchmarks into their own module like eip2537

[kevaundray]

In #2327 , the bls benchmarks were added in a more modular way -- this PR moves all of the previous benchmarks in bench.rs into their own module to follow the same structure

[codspeed-hq]

CodSpeed Performance Report

Merging #2335 will not alter performance

_{Comparing kevaundray:kw/small-refactor-benchmarks (1f25eb5) with main (7a98764)}

Summary

✅ 21 untouched benchmarks
🆕 5 new benchmarks
⁉️ 4 dropped benchmarks

⚠️ Please fix the performance issues or acknowledge them on CodSpeed.

Benchmarks breakdown

	Benchmark	BASE	HEAD	Change
🆕	bn128 add precompile	N/A	22 µs	N/A
🆕	bn128 mul precompile	N/A	343.2 µs	N/A
🆕	ecpairing precompile	N/A	4.9 ms	N/A
🆕	ecrecover precompile	N/A	202.4 µs	N/A
🆕	kzg precompile	N/A	7.5 ms	N/A
⁉️	precompile bench | bn128 add precompile	22 µs	N/A	N/A
⁉️	precompile bench | bn128 mul precompile	343.2 µs	N/A	N/A
⁉️	precompile bench | ecpairing precompile	4.9 ms	N/A	N/A
⁉️	precompile bench | kzg precompile	7.5 ms	N/A	N/A