[TASK] Avoid QueryBuilder::resetQueryPart() in ext:indexed_search

Doctrine 4 will no longer provide access to SQL query parts,
so we need to adjust our internal usages to cope with this
change. The strategy by rule of thumb involves to not reuse
queryBuilder instances, so no reset must happen anyway.

Resolves: #100914
Releases: main
Change-Id: Iac7232fa49f77eb27514a86350cf536e701ee9e5
Reviewed-on: https://review.typo3.org/c/Packages/TYPO3.CMS/+/79138


Tested-by: core-ci <typo3@b13.com>
Reviewed-by: Christian Kuhn <lolli@schwarzbu.ch>
Tested-by: Stefan Bürk <stefan@buerk.tech>
Reviewed-by: Stefan Bürk <stefan@buerk.tech>
Tested-by: Christian Kuhn <lolli@schwarzbu.ch>