[TASK] Add meaningful terms in various PHPDocs and comments

To make examples more clear more meaningful terms are now used.

Resolves: #90550
Releases: master, 9.5
Change-Id: Iee68811177fdee85b0f89f5ce120b217222039f9
Reviewed-on: https://review.typo3.org/c/Packages/TYPO3.CMS/+/63445


Tested-by: TYPO3com <noreply@typo3.com>
Tested-by: Tymoteusz Motylewski <t.motylewski@gmail.com>
Tested-by: Georg Ringer <georg.ringer@gmail.com>
Reviewed-by: Tymoteusz Motylewski <t.motylewski@gmail.com>
Reviewed-by: Georg Ringer <georg.ringer@gmail.com>