next.js

92ea5635 - Development: Only require loadJsConfig when using webpack (#83623)

Development: Only require loadJsConfig when using webpack (#83623) ## What? Don't require/call loadJsConfig when using Turbopack, as it's handled internally. loadJsConfig is one of the places where TypeScript gets loaded. There's still the TS verify as well, this narrows the amount of places where TypeScript gets loaded to make it easier to remove that loading of TypeScript in a future PR.