Add support for GHC 9.8.4 (copy #2860)

[mergify]

Fixes #2852

Still TODO:

• Write a changelog entry (see changelog/README.md)
• Check copyright notices are up to date in edited files

---

This is an automatic copy of pull request #2860 done by [Mergify](https://mergify.com).

[mergify]

Cherry-pick of de938a1 has failed:

On branch mergify/copy/1.8/pr-2860
Your branch is ahead of 'origin/1.8' by 1 commit.
  (use "git push" to publish your local commits)

You are currently cherry-picking commit de938a14.
  (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:   .ci/docker/Dockerfile
	modified:   .ci/stack-9.8.yaml
	modified:   .gitlab-ci.yml

Unmerged paths:
  (use "git add <file>..." to mark resolution)
	both modified:   .ci/docker/build-and-publish-docker-image.sh
	both modified:   .ci/gitlab/benchmark.yml
	both modified:   .ci/gitlab/common.yml
	both modified:   .github/workflows/ci.yml

Cherry-pick of ccc6daa has failed:

On branch mergify/copy/1.8/pr-2860
Your branch is ahead of 'origin/1.8' by 2 commits.
  (use "git push" to publish your local commits)

You are currently cherry-picking commit ccc6daa0.
  (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:   .ci/gitlab/test.yml
	modified:   .gitlab-ci.yml
	modified:   clash-ffi/clash-ffi.cabal

Unmerged paths:
  (use "git add <file>..." to mark resolution)
	both modified:   .ci/build.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