[TASK] Resolve more dead code paths

More code paths identified as dead by PHPStan, or
that PHPStan isn't understanding correctly.

Used command:

> Build/Scripts/runTests.sh -s phpstanGenerateBaseline

Resolves: #97649
Releases: main, 11.5
Change-Id: I8ff67b7ebda5d64624d4e42a9775e4709bff3f08
Reviewed-on: https://review.typo3.org/c/Packages/TYPO3.CMS/+/74836


Tested-by: core-ci <typo3@b13.com>
Tested-by: Stefan Bürk <stefan@buerk.tech>
Tested-by: Nikita Hovratov <nikita.h@live.de>
Reviewed-by: Stefan Bürk <stefan@buerk.tech>
Reviewed-by: Nikita Hovratov <nikita.h@live.de>