[FEATURE] Add API to anonymize IP addresses

Add an API to anonymize IP addresses.
The core uses this API to anonymize all IP addresses before
storing them. E.g. when logging.

This a necessary tool in order to comply with data and privacy
protections laws.

Resolves: #84053
Releases: master, 8.7, 7.6
Change-Id: Id45ee94696dee4fa2293e1226f2076883f6b9ade
Reviewed-on: https://review.typo3.org/56718


Tested-by: TYPO3com <no-reply@typo3.com>
Reviewed-by: Markus Klein <markus.klein@typo3.org>
Tested-by: Markus Klein <markus.klein@typo3.org>
Reviewed-by: Georg Ringer <georg.ringer@gmail.com>
Tested-by: Georg Ringer <georg.ringer@gmail.com>