kindergarten-garden: Sync tests

[tasxatzial]

Sync and complete rewrite of all tests.

Coming up with appropriate names for each deftest is nearly impossible for this exercise since the test descriptions are overly long, and some tests are nested three levels deep. So, I just used the test-<uuid> naming convention proposed in issue #673.

I also used one deftest per test, as suggested in the aforementioned issue.

Note: There are multiple issues with the error messages when >1 tests are placed under a single deftest. I'll open an issue about that soon in the test runner repo.

[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]

For more information, refer to the documentation. If you are unsure whether to add the message or not, please ping @exercism/maintainers-admin in a comment. Thank you!

[iHiD]

Approving to unblock