tests: Update msw to latest and migrate all tests to match
- Move mockUtils; move setupServer to mockUtils.
- git mv all src/ tests to test/src.
- Update all services tests to use the new service worker; start moving test data to separate directories.
- Replace bare objects in evaluator/MW stubs with Maps.
- Run stub setup inside of test fixtures.
- Lint it.
- Omit benchmarks from main test suite; they break it.
- Fix the casualties.
- Fix benchmarks and lint again.
Bug: T351414
Edited by Jforrester