hadrian: Don't include the package hash in the haddock directory

Zubinrequested to merge
wip/26635 into master

hadrian: Don't include the package hash in the haddock directory

Since GHC 9.8 and hash_unit_ids, haddock urls have looked likeghc-9.10.3/doc/html/libraries/base-4.20.2.0-39f9/**/*.html

The inclusion of the hash makes it hard for downstream non-boot packages to properly link to these files, as the hash is not part of a standard cabal substitution.

Since we only build one version of each package, we don't need the hash to disambiguate anything, we can just remove it.

Fixes #26635 (closed)

Merge request reports