[BUGFIX] Avoid exception in ContentObjectRenderer with PHP8

This patch ensures that the getQuery() function only uses the
minus operator to negate the $storagePid variable, if the variable
can be interpreted as an integer.

Resolves: #96321
Releases: main, 11.5
Change-Id: Idacd43fd6639218fc1126bffcd43e78338f18e0e
Reviewed-on: https://review.typo3.org/c/Packages/TYPO3.CMS/+/72704


Tested-by: Nikita Hovratov <nikita.h@live.de>
Tested-by: core-ci <typo3@b13.com>
Tested-by: Benni Mack <benni@typo3.org>
Reviewed-by: Nikita Hovratov <nikita.h@live.de>
Reviewed-by: Benni Mack <benni@typo3.org>