bug: not getting all logs in CI network tests

[just-mitch]

I hit a flake in a transfer test.

https://github.com/AztecProtocol/aztec-packages/actions/runs/12036992401/job/33559895193?pr=10215

But the uploaded logs don't have anywhere near all the logs, so triage is impossible.

[ludamad]

We likely need to add ulimit calls and others to make sure we can open a lot of files, as 16 validators gets chatty