`stack haddock` generates incorrect relative links

### Overview

When running `stack haddock` in a project, the generated documentation uses incorrect relative links for re-exported packages in the index file. This seems to be caused by the wrong argument being given to the `-i` option when invoking Haddock.

### Steps to reproduce

Create a trivial project, like so:
```
# stack.yaml
snapshot:
url: https://raw.githubusercontent.com/commercialhaskell/stackage-snapshots/master/lts/24/34.yaml
packages:
- .

# package.yaml
dependencies:
- base

library:
source-dirs: lib
```

Then run `stack haddock`. Then open the documentation at `file:////.stack-work/install////doc/all/index.html`.

In it, all links to modules in `base` are incorrect. For instance, the link for `Data.Eq` points to `doc/base-4.20.2.0-127e/Data-Eq.html`. The `base-4.20.2.0-127e` folder does not exist, but `base-4.20.2.0` does.

Running `stack haddock --verbose` reveals that the `all` documentation was generated with the following call to haddock (i have replaced parts of the path with `$HOME` and `$PROJECT` to try to make it a tiny bit less verbose, but it's still a lot, sorry):

```
$HOME/.ghcup/ghc/9.10.3/bin/haddock-ghc-9.10.3 \
--optghc=-package-db=$HOME/.stack/snapshots/x86_64-linux/8a23ab0f4c447aa1863c20e527e4f2aeeec2f0c3c2ab9fbe859c65d4c711ecc7/9.10.3/pkgdb \
--optghc=-package-db=$HOME/$PROJECT/.stack-work/install/x86_64-linux/8a23ab0f4c447aa1863c20e527e4f2aeeec2f0c3c2ab9fbe859c65d4c711ecc7/9.10.3/pkgdb \
--gen-contents \
--gen-index \
-i ../ghc-internal-9.1003.0-a65c,$HOME/.ghcup/ghc/9.10.3/lib/ghc-9.10.3/lib/../../../share/doc/ghc-9.10.3/html/libraries/ghc-internal-9.1003.0-a65c/ghc-internal.haddock \
-i ../haddock-issue-0.0.0,$HOME/$PROJECT/.stack-work/install/x86_64-linux/8a23ab0f4c447aa1863c20e527e4f2aeeec2f0c3c2ab9fbe859c65d4c711ecc7/9.10.3/doc/haddock-issue-0.0.0/haddock-issue.haddock \
-i ../ghc-bignum-1.3-9ca9,$HOME/.ghcup/ghc/9.10.3/lib/ghc-9.10.3/lib/../../../share/doc/ghc-9.10.3/html/libraries/ghc-bignum-1.3-9ca9/ghc-bignum.haddock \
-i ../base-4.20.2.0-127e,$HOME/.ghcup/ghc/9.10.3/lib/ghc-9.10.3/lib/../../../share/doc/ghc-9.10.3/html/libraries/base-4.20.2.0-127e/base.haddock \
-i ../ghc-prim-0.12.0-d0f9,$HOME/.ghcup/ghc/9.10.3/lib/ghc-9.10.3/lib/../../../share/doc/ghc-9.10.3/html/libraries/ghc-prim-0.12.0-d0f9/ghc-prim.haddock
```

The key element is that **the argument to `-i` is incorrect**. Note, for instance, that for base, the argument is as follows: `-i ../base-4.20.2.0-127e,path/to/base.haddock`. Re-running the command, but will the argument to `-i` changed to not include the prefix fixes all relative links in the generated documentation.

### Stack version

```
$ stack --version
Version 3.9.3, Git revision c7eb8487a82d5c3e0b88d56f8b8a98be23223eb5 x86_64 hpack-0.39.1
```