[!!!][TASK] Remove legacy ArrayAccess functionality of LinkResult

The introduced LinkResult object and its functionality
has had a fallback built via ArrayAccess for the
LinkBuilderInterface to be compatible with array-ish
LinkResult objects to access the previously returned array
until TYPO3 v11 LTS.

This change now removes the legacy layer, as TYPO3 only
works with the LinkResult object directly everywhere.

Resolves: #97546
Related: #96107
Related: #96317
Releases: main
Change-Id: I733c85359b2f8b5886626a67fe106806f5405c7b
Reviewed-on: https://review.typo3.org/c/Packages/TYPO3.CMS/+/74509


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