[BUGFIX] Fix the upgrade docs panel and add tests

Docs panel will open on click and show its content
again and add tests for all cards in this module
to make sure it is and will stay fully functional.

Resolves: #94472
Releases: master
Change-Id: I6a30e64b3b2a4988550b6f18e50dc1ca51cc3f22
Reviewed-on: https://review.typo3.org/c/Packages/TYPO3.CMS/+/69688


Tested-by: core-ci <typo3@b13.com>
Tested-by: Andreas Fernandez <a.fernandez@scripting-base.de>
Tested-by: Benni Mack <benni@typo3.org>
Reviewed-by: Andreas Fernandez <a.fernandez@scripting-base.de>
Reviewed-by: Benni Mack <benni@typo3.org>