Only add optimize packages to transpile packages during production build #65245
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What?
#63537 introduced an issue where compilation of a new route (like an api route) on the pages router during local webpack dev caused the hash of _document.js to change, forcing active hmr pages to do a full page refresh.
This PR simply forces the above-mentioned PR to only apply during production builds and not during dev (likely the time you care about optimizing imports anyway)
Why?
The above mentioned bug was causing issues for our local dev as the page would refresh as soon as we hit an api route