Captain's Log: Fix random override cleanup

[SleeplessByte]

See: https://forum.exercism.org/t/tests-instructions-not-displayed/18559/6

~~(Do not merge quite yet, testing now locally if this actually solves it, will remove this message when done)~~

We also need a test-runner update for beforeEach per describe. Will fix that too.

Do not merge yet

When we merge this without updating the browser-test-runner, you won't be able to complete this in the browser anymore. Right now in the browser you can complete it by starting the tests 3x once it fails.

[github-actions[bot]]

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