Migrate scripted tests to jest

[Racer159]

Describe what should be investigated or refactored

We should refactor the tests introduced in #50 into jest tests instead to align with the patterns of other repositories (like GitLab Runner)

Links to any relevant code

https://github.com/defenseunicorns/uds-package-valkey/blob/f68ba6181ae4413b5b5a660ef86b990aa8721f41/tests/watch-jobs.sh

Additional context

This was added as a script to speed delivery of the feature - the test could also be refactored to send traffic more directly through a replicated node so that it doesn't have to make as many requests to hit a replicated node (which may cause flakes).