Write stress test for proofs per second

[MauroToscano]

Depends on https://github.com/yetanotherco/aligned_layer/issues/1113

Notice we already have a stress test, but the batcher process each user sequentially. To check a high throughput scenario, we need to send proofs from multiple accounts.

Having the spammer of connections ready, of issue #1113, will make this issue easier to do

[PatStiles]

https://github.com/pkolaczk/latte