perf: fuzz/invariant benchmarks

### Component

Forge

### Describe the feature you would like

There are currently no benchmarks for the fuzz and invariant test features, so it's hard to know how good forge actually is compared to other tools like echidna and harvey.

Echidna has a lot of test cases in its repo, maybe those can be used? https://github.com/crytic/echidna/tree/master/tests/solidity

### Additional context

_No response_