Remove uuids from test functions

[tasxatzial]

No more uuids in test functions (removed only from already merged PRs)

Also test descriptions in Clojure tests are now identical to the descriptions in their corresponding .toml files.

[github-actions]

This PR touches files which potentially affect the outcome of the tests of an exercise. This will cause all students' solutions to affected exercises to be re-tested.

If this PR does not affect the result of the test (or, for example, adds an edge case that is not worth rerunning all tests for), please add the following to the merge-commit message which will stops student's tests from re-running. Please copy-paste to avoid typos.

[no important files changed]

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