[FEATURE] Add Events to AdminPanel

To promote the new PSR-14 Events and to make it easier for people to
see which kinds of events may be used, the admin panel now displays
all events that are dispatched in the current request with their
parameters.

Resolves: #90265
Releases: master
Change-Id: I3c73ab19168954e66ca3bb73762a26a3cb9628a2
Reviewed-on: https://review.typo3.org/c/Packages/TYPO3.CMS/+/63041


Tested-by: Anja Leichsenring <aleichsenring@ab-softlab.de>
Tested-by: TYPO3com <noreply@typo3.com>
Tested-by: Georg Ringer <georg.ringer@gmail.com>
Tested-by: Benni Mack <benni@typo3.org>
Reviewed-by: Georg Ringer <georg.ringer@gmail.com>
Reviewed-by: Benni Mack <benni@typo3.org>