[BUGFIX] Cast integer to string items during route argument mapping

Resolves: #90229
Releases: master, 9.5
Change-Id: Iec8baa5dbe23d78dd4bfae460b501c2da5cb6bd4
Reviewed-on: https://review.typo3.org/c/Packages/TYPO3.CMS/+/63056


Tested-by: TYPO3com <noreply@typo3.com>
Tested-by: Benni Mack <benni@typo3.org>
Tested-by: Andreas Fernandez <a.fernandez@scripting-base.de>
Reviewed-by: Benni Mack <benni@typo3.org>
Reviewed-by: Guido Schmechel <guido.schmechel@brandung.de>
Reviewed-by: Andreas Fernandez <a.fernandez@scripting-base.de>