[TASK] Improve naming of the reaction type

An administrator can create multiple reactions
of the same reaction type. To make this clear,
corresponding code parts are now renamed to
use the "reaction type" term consistently.

Resolves: #99252
Related: #98373
Releases: main
Change-Id: Ib2111ae193f4a340152c1692d52861f199e69919
Reviewed-on: https://review.typo3.org/c/Packages/TYPO3.CMS/+/76885


Reviewed-by: Oliver Bartsch <bo@cedev.de>
Reviewed-by: Oliver Hader <oliver.hader@typo3.org>
Tested-by: core-ci <typo3@b13.com>
Tested-by: Oliver Hader <oliver.hader@typo3.org>
Tested-by: Benni Mack <benni@typo3.org>
Tested-by: Oliver Bartsch <bo@cedev.de>
Reviewed-by: Benni Mack <benni@typo3.org>