[TASK] Move YamlFileLoader->merge to ArrayUtillity

The function merge of TYPO3\CMS\Core\Configuration\Loader\YamlFileLoader
is moved to TYPO3\CMS\Core\Utility\ArrayUtillity to have it globally
available.

Resolves: #88652
Releases: master
Change-Id: Icf200c89edb572ea2424ae0bcf8292e6dbb3de6a
Reviewed-on: https://review.typo3.org/c/Packages/TYPO3.CMS/+/61168


Tested-by: TYPO3com <noreply@typo3.com>
Tested-by: Benni Mack <benni@typo3.org>
Tested-by: Jan Stockfisch <typo3@jan-stockfisch.de>
Tested-by: Frank Naegler <frank.naegler@typo3.org>
Reviewed-by: Benni Mack <benni@typo3.org>
Reviewed-by: Jörg Bösche <typo3@joergboesche.de>
Reviewed-by: Jan Stockfisch <typo3@jan-stockfisch.de>
Reviewed-by: Frank Naegler <frank.naegler@typo3.org>