dillon1000/react

[DOM] Infer react-server entries bundles if not explicitly configured (#28795)

When packaging we want to infer that a bundle exists for a
`react-server` file even if it isn't explicitly configured. This is
useful in particular for the react-server entrypoints that error on
import that were recently added to `react-dom`

This change also cleans up a wayward comment left behind in a prior PR