Abort tests running for more than 60s to catch deadlocks (#3694)
We observed recent deadlocks (e.g.
https://github.com/astral-sh/uv/actions/runs/9173987312/job/25223866259?pr=3693)
causing CI to run until the default github actions timeout. To prevent
this, we add a 60s timeout in nextest. 60s should be enough both on CI
and on developers' machines.
