Two fixes to multi repl command (backport #10017) (#10085)

* Add extra ghc options to multi-repl file

These options are configured into the program by Cabal, so we also need
to extract these and put them into the mutli-file.

Fixes #10015

(cherry picked from commit 539cb7bc)

* Fix rendering of `-j` option in multi-repl

Before this was rendered as..

```
/run/current-system/sw/bin/ghc --interactive -package-env - -j 'NumJobs (Just 8)' ...
```

Due to this place not being updated when support for semaphores was
added.

(cherry picked from commit c3708d21)

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Co-authored-by: Matthew Pickering <matthewtpickering@gmail.com>
Co-authored-by: mergify[bot] <37929162+mergify[bot]@users.noreply.github.com>