Fix out-of-memory errors in CI when running run-tests in rules_haskell_tests.

[cgrindel]

Ci on the master branch started failing on 2023-12-18. It appears to be related to the rules_haskell_tests portion of the CI workflow.

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1. fix: shutdown Bazel before executing run-tests #2092
   +0
   
2. chore: disable flaky test that fails with ExitFailure (-9) #2096
   +0
   
3. Refactor the disabled test to prevent the OOM.

[avdv]

This seems to be a bit flaky, as this does not happen very often. Seems like the bazel processes get killed:

Exit Code: ExitFailure (-9)

Maybe this is some sort of timeout?

[cgrindel]

It could be. I have been trying to set up my personal MacOS laptop with Nix to try things out. (My Modus laptop is arm64 and I have not completed the work getting rules_haskell to work over there.) Unfortunately, the Nix install is failing. I must not have cleaned up from a previous Nix install attempt. 😣

[cgrindel]

This issue seems to suggest that it may be running out of memory.

[cgrindel]

For code locations where run-tests starts servers, see @avdv comment.