Automatic babel-loader followup (#3944)
This:
* Addresses feedback from https://github.com/vercel/turbo/pull/3862
* Exempts VirtualAssets from webpack loaders. This addresses a bug where
next-hydrate.tsx could not be read.
* Adds `ModuleRuleCondition::ResourceIsVirtualAsset` to filter these
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Co-authored-by: Justin Ridgewell <justin@ridgewell.name>
