Import code action imports inside of CPP

### Your environment
Output of `haskell-language-server --probe-tools` or `haskell-language-server-wrapper --probe-tools`:

```sh
haskell-language-server version: 1.0.0.0 (GHC: 8.8.4) (PATH: /home/sandy/.local/bin/haskell-language-server) (GIT hash: 25252164db6b2a01ccb0a7436009478ce2939f0a)
Tool versions found on the $PATH
cabal: 3.2.0.0
stack: 2.3.3
ghc: 8.10.4
```
Which lsp-client do you use: vim/coc

### Steps to reproduce
```haskell
{-# LANGUAGE CPP #-}

import Prelude
#ifdef __GLASGOW_HASKELL__
import Data.Maybe
#endif

foo :: All
foo = All True
```

Use the "Import`All` from `Data.Monoid`" code action.

### Expected behaviour
```haskell
import Prelude
import Data.Monoid
#ifdef __GLASGOW_HASKELL__
import Data.Maybe
#endif
```

### Actual behaviour
```haskell
import Prelude
#ifdef __GLASGOW_HASKELL__
import Data.Maybe
import Data.Monoid
#endif
```

### Why this is frustrating

Rather than using ifdef, consider if the CPP is `#if __GLASGOW_HASKELL__ == 808`, then your imports only get added for your current compiler version.