Use --io-manager=native in lib-suite on Windows (backport #10114)

[mergify]

Closes #9571

---

This is an automatic backport of pull request #10114 done by [Mergify](https://mergify.com).

[mergify]

Cherry-pick of a562b57 has failed:

On branch mergify/bp/3.12/pr-10114
Your branch is up to date with 'origin/3.12'.

You are currently cherry-picking commit a562b57da.
  (fix conflicts and run "git cherry-pick --continue")
  (use "git cherry-pick --skip" to skip this patch)
  (use "git cherry-pick --abort" to cancel the cherry-pick operation)

Changes to be committed:
	modified:   cabal-testsuite/cabal-testsuite.cabal

Unmerged paths:
  (use "git add <file>..." to mark resolution)
	both modified:   validate.sh

To fix up this pull request, you can check it out locally. See documentation: https://docs.github.com/en/pull-requests/collaborating-with-pull-requests/reviewing-changes-in-pull-requests/checking-out-pull-requests-locally

[geekosaur]

Uh. So if this was broken, how did it pass CI? (Every subsequent backport is failing on Windows with an -rtsopts error.)