Fix CI

[tomsmeding]

This PR builds on top of #83 (CUDA 13 support), merge that PR first!
Actual changes in addition to #83 can be seen in this compare view.

• Updated github actions to newest versions.
• Fixed some bugs in Setup.hs (most of my own making in Support new Cabal library in Setup.hs (3.12, 3.14, 3.16) #82) that only occurred with old GHC/Cabal.
• Unlist GHC <8.4 from CI matrix because (the latest) stack doesn't support them any more
• Add extra-deps for language-c to the stack.yamls before stackage LTS 23 in order to support CUDA 13
• CI is green :)

The oldest 4 GHC versions that we have a stack.yaml for are now untested in CI, but I kept the files nevertheless (and added the extra-deps for language-c without testing). I figured that they might be useful for someone. Also happy to remove them if that is better.

EDIT: It's worth noting that, as before, this CI only tests whether the thing builds. While that's a useful test, it's a far cry from proper testing. Fortunately, some of this code is at least tested on recent GHC/Cabal/CUDA versions via integration with accelerate-llvm-ptx, but it's not all.