[BUGFIX] Only treat numerical route arguments as possible UIDs

`PersistedAliasMapper` and `PersistentPatternMapper` both should only
use int-like string route arguments as possible UID candidates for the
following DB lookup.

Thus, check if the arguments are truly numerical before passing them to
the database queries.

Resolves: #93105
Releases: main, 12.4
Change-Id: Ic3b9b5415abfce602b6be7c8031202823ea25e60
Reviewed-on: https://review.typo3.org/c/Packages/TYPO3.CMS/+/80416


Tested-by: Stefan B�rk <stefan@buerk.tech>
Reviewed-by: Stefan B�rk <stefan@buerk.tech>
Tested-by: core-ci <typo3@b13.com>