TST: Use pytest-timeout plugin to prevent handing tests

[basnijholt]

Sometimes 3.13t seems to hang until the CI times out after 6 hours. This prevents that.

[codecov]

Codecov Report

All modified and coverable lines are covered by tests ✅

see 2 files with indirect coverage changes

🚀 New features to boost your workflow:

• ❄ Test Analytics: Detect flaky tests, report on failures, and find test suite problems.

[codspeed-hq]

CodSpeed Performance Report

Merging #459 will not alter performance

_{Comparing pytest-timeout (5b97238) with main (9a51a65)}

Summary

✅ 4 untouched benchmarks