Add reproduction case for failing quasiquoting when using JS backend

[sevanspowell]

• When using quasiquoting, the JS backend is failing (with ghc-9.8.2) due to missing "nodejs" executable and "ghci" package.

• This PR adds a failing test to demonstrate this behaviour.

• Execute the test with:

  nix-build -A allJobs.x86_64-linux.unstable.ghc982.ghcjs.tests.js-template-haskell.build
  

  The error is:

  node: createProcess: posix_spawnp: does not exist (No such file or directory)
  

• We can add nodejs to the package build-tools to fix the nodejs issue:

      ({ pkgs,... }: {
        packages.js-template-haskell.components.library.build-tools = [ pkgs.pkgsBuildHost.nodejs ];
      })
  

• The error is now:

  JS interpreter: couldn't find "ghci" package
  

• I am unsure how to fix this error.

I think haskell.nix should add nodejs and ghci to the build environment when using the GHC JS backend, so that compiling code using quasiquoting/template haskell "just works" without too many headaches.

Evidence that nodejs and ghci are required:

• ghci: https://gitlab.haskell.org/ghc/ghc/-/blob/ffe3e5c1e3868bb23bc1ce24dd671729d387f723/compiler/GHC/Runtime/Interpreter/JS.hs#L169
• nodejs: https://gitlab.haskell.org/ghc/ghc/-/blob/ffe3e5c1e3868bb23bc1ce24dd671729d387f723/compiler/GHC/Runtime/Interpreter/JS.hs#L128

[sevanspowell]

Additionally, is there a way to restrict my test to only run on ghc >=9.8.2? I don't think earlier versions of GHC/GHCJS support building with Template Haskell.

[hamishmack]

I don't think earlier versions of GHC/GHCJS support building with Template Haskell.

GHCJS 8.10 supports TH.

[hamishmack]

Moved to #2199