kona-sp1: Implement simple low-hanging-fruit zkvm optimizations

Doing things like calling `mem::forget` to leak values instead of `Drop`ping them, minimizing the amount of `clone()` and `Copy` calls performed. Should accompany a cycle count comparison to know the expected impact.

Start by locating the kona-sp1 zkVM code and its cycle-count comparison tooling. Inspect the paths involving Drop, mem::forget, clone(), and Copy, then compare cycle counts before and after the targeted optimizations. Done means the selected low-cost changes are implemented and their expected impact is recorded.

Written by the indexing model from the issue text.