[TASK] Enhance custom event dispatching in modal dialog

* allows custom events to bubble up in DOM tree
* ensures that custom events are dispatched at those elements
  that initially contained the `data-event-name` attributes

Resolves: #91186
Releases: master
Change-Id: I0c5951a573bba0bbe73967ffcecf5dcfeae2e2f2
Reviewed-on: https://review.typo3.org/c/Packages/TYPO3.CMS/+/64311


Tested-by: TYPO3com <noreply@typo3.com>
Tested-by: Susanne Moog <look@susi.dev>
Tested-by: Andreas Fernandez <a.fernandez@scripting-base.de>
Reviewed-by: Benni Mack <benni@typo3.org>
Reviewed-by: Susanne Moog <look@susi.dev>
Reviewed-by: Andreas Fernandez <a.fernandez@scripting-base.de>