Don't error asking for prebuilt bundles (#71778)
Turbopack doesn't recognize webpack:// and so errors otherwise.
We don't need source maps for internals.
<img width="774" alt="Screenshot 2024-10-23 at 10 13 02 PM"
src="https://github.com/user-attachments/assets/72ec2ecc-7fbb-4a2a-9978-8d8c365ab966">
