[TASK] Harden ResourceFactory->getFileReferenceObject()

The method throws an exception on !is_numeric() already.
This includes float, which is bogus. We can simplify
with an argument type hint.

Resolves: #103175
Releases: main
Change-Id: I990f273f16581c553e17cb610524e2cbc3659baa
Reviewed-on: https://review.typo3.org/c/Packages/TYPO3.CMS/+/83076


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