feat(simulations): add statistic of chain usage and performance for simulation change

[matthiasmatt]

When a PR updates any of the simulation workflow, we need to understand the impact for several metrics:

• Average block size
• Average gas consumed by transactions (per type?)
• other metrics??

This way we can have an idea of the delta introduced by each new transactions or changes in begin block / end block.

it would be awesome to have some automatic report when creating the PR and running the tests!