[TASK] Add return type hints to some GeneralUtility methods

Add return type hints to the IP comparison
related methods in GeneralUtility.

Resolves: #100050
Releases: main
Change-Id: Idcca71236341dc1fe789bae9e9e14d6e8835fac9
Reviewed-on: https://review.typo3.org/c/Packages/TYPO3.CMS/+/77986


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