Extend RPC benchmarking to more methods

# Summary

Once we have a list of the top X methods RPC providers use (based on live usage), we can start prioritising those for potential performance improvements.

# Completion Criteria

- [ ] Obtain the list of top X methods @AlexeyKrasnoperov. Once we have the list, we can decide how to split it into digestible chunks.
- [ ] Add implementations for testing to https://github.com/ChainSafe/forest/tree/main/benchmarks

# Additional Links & Resources