Improve `eth_*` methods performance

# Summary

We've got some numbers on real traffic; for several methods they don't look good and while Forest takes significantly less resources, there should be some room for improvement.

# Motivation

Performance and resource usage are the selling points of Forest. There's nothing we can't do in Rust that is done in Golang.

# Tasks

- [ ] All listed methods should be at least as fast as in Lotus - few times slower is not acceptable
- [ ] Ignore `debug_traceBlockByNumber` and `debug_traceTransaction`, they were not actually invoked

# Risks & Dependencies

# Additional Links & Resources