haskell.compiler: port all make/native-bignum GHCs to common expr

The common expression is a little messy to avoid rebuilds. It can be
cleaned up in a second step.

`9.4.8.fixme.nix` is used temporarily so that git's rename detection
gets where common-make-native-bignum.nix is coming from.

8.10.7 keeps its expression since it uses integer-simple which changes
the expression's interface. This is unfortunately very annoying to
reflect in a common expression.

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