[!!!][TASK] Remove personalized search statistics from indexed search

Indexed search captures search statistics and which words
were searched. However, TYPO3 only evaluates the searched
words, which do not contain any user/IP specific values.

This change removes the personalized tracking information,
as only the word-based statistics are evaluated.

Also the database table "index_stat_search" gets removed.

Resolves: #92993
Releases: master
Change-Id: I7ab5f9d4a23a79b68274db1a709551604f5479fb
Reviewed-on: https://review.typo3.org/c/Packages/TYPO3.CMS/+/66996


Tested-by: Anja Leichsenring <aleichsenring@ab-softlab.de>
Tested-by: TYPO3com <noreply@typo3.com>
Tested-by: Georg Ringer <georg.ringer@gmail.com>
Reviewed-by: Anja Leichsenring <aleichsenring@ab-softlab.de>
Reviewed-by: Georg Ringer <georg.ringer@gmail.com>