Finley McIlwaine authored Feb 12, 2023 and Matthew Pickering committed Feb 16, 2023

The patches primarily deal with mtl-2.3.1 issues, just making consumers
of the package buildable. These were necessary to get some components of
HLS building on GHC 9.6.

During this process it was also discovered that the `vector-space`
package was affected by GHC issue
ghc/ghc#22912 so I've added it to
`extra_packages` in CI.

This commit also includes a small change to the `patch-tool` that fixes
the unpack script in the case that a package which shares a prefix with
the package being upacked is already in the packages dir (e.g. `Chart`
and `Chart-diagrams`).