feat(turbopack): emit raw image bytes for unsupported codec (#5967)
### Description
Turbopack fails & errors when the given image import is non decode /
encodeable. This is a large papercut to run some pages as single image
import blockes entire page rendering. Enabling those codec support
(avif, webp) is unforunately not trivial to achieve across all of the
platforms.
This PR flips the approach, instead of bailing out if certain compile
time feature is not enabled (webp/avif), emits raw bytes to the image
directly. Browser may / may not support render, also this disables
optimizations but at least can render remaining pages.
It is stopgap still; the eventual goal is enable full codec support.
Closes WEB-1590