[!!!][TASK] Remove EXT: linkvalidator TSconfig option

The EXT:linkvalidator related TSconfig option
is not evaluated anymore and therefore now removed.

Resolves: #96170
Related: #92693
Releases: main
Change-Id: I7ef5f142b53b1771872ccd34905bd2bdd5e9fbb4
Reviewed-on: https://review.typo3.org/c/Packages/TYPO3.CMS/+/72433
Tested-by: Wouter Wolters <typo3@wouterwolters.nl>
Tested-by: core-ci <typo3@b13.com>
Tested-by: Benni Mack <benni@typo3.org>
Reviewed-by: Wouter Wolters <typo3@wouterwolters.nl>
Reviewed-by: Benni Mack <benni@typo3.org>
338 jobs for main in 38 minutes and 12 seconds (queued for 1 minute and 17 seconds)