These tests are rolled into the Chromium DevTools Frontend codebase. They "belong" to the devtools frontend, but are truly defined in this Lighthouse repo.
Run with sh core/test/devtools-tests/test-locally.sh.
See core/test/devtools-tests/README.md for more.
rsync -ahvz --exclude='OWNERS' ~/src/devtools/devtools-frontend/test/e2e/lighthouse/ third-party/devtools-tests/e2e/lighthouse/
rsync -ahvz --exclude='OWNERS' ~/src/devtools/devtools-frontend/test/e2e/resources/lighthouse/ third-party/devtools-tests/e2e/resources/lighthouse/