next.js

90fa2582 - Wait for dev server restart after `next.config.js` changes in tests (#67601)

Wait for dev server restart after `next.config.js` changes in tests (#67601) This allows us to change the `next.config.js` file before a test with an already running dev server, without getting connection issues because the dev server may not have restarted in time for the next test to trigger requests.