Link failure with cabal haddock, data-files, and annotations.

In a library with `data-files` set in the cabal file, if we try to use a function defined in the `Paths_*` generated module in an `{-# ANN module #-}` annotation, `cabal haddock` fails with a hard to understand GHCi linker error.

This is the case with cabal-install 2.2 and 2.4

[This gist](https://gist.github.com/Taneb/cafb8a4433298a24a100708a8529495a) has an example

Start by reproducing the data-files, generated Paths_* module, and module annotation example from the linked gist with cabal haddock under cabal-install 2.2 or 2.4. Trace the resulting GHCi linker error through the Cabal/Haddock entry points; done means the example builds successfully without the hard-to-understand linker failure.

Written by the indexing model from the issue text.