fix: make OpEvm impl blocks generic over precompiles

[klkvr]

Followup for #2119

[Rjected]

oops, missed these

[codspeed-hq]

CodSpeed Performance Report

Merging #2142 will degrade performances by 2.72%

_{Comparing klkvr/generic-op-exec (86465b0) with main (4a42c45)}

Summary

❌ 1 regressions
✅ 7 untouched benchmarks

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

Benchmarks breakdown

	Benchmark	BASE	HEAD	Change
❌	precompile bench | ecrecover precompile	196.8 µs	202.3 µs	-2.72%