[TASK] Activate two skipped unit tests

Two unit tests are skipped since they try to verify
correct behavior while the system under test returns
something broken or not implemented.

The patch activates the tests to document the broken
behavior and adds `@todo` annotations explaining what
is going wrong or should be expected.

Resolves: #103922
Releases: main
Change-Id: Ib93bfa6baa3cb8369e084bd01a7dd0d40c7a4bee
Reviewed-on: https://review.typo3.org/c/Packages/TYPO3.CMS/+/84409


Reviewed-by: Anja Leichsenring <aleichsenring@ab-softlab.de>
Tested-by: Christian Kuhn <lolli@schwarzbu.ch>
Tested-by: Stefan Bürk <stefan@buerk.tech>
Tested-by: core-ci <typo3@b13.com>
Tested-by: Anja Leichsenring <aleichsenring@ab-softlab.de>
Reviewed-by: Stefan Bürk <stefan@buerk.tech>
Reviewed-by: Christian Kuhn <lolli@schwarzbu.ch>