[TASK] Move Copyright information generation out of TYPO3 Backend

The BackendUtility::getCopyRightNotice() is ugly, and can only be used
in Backend context (not install tool).

A new PHP class "Typo3Copyright" in EXT:core encapsulates this
information so it can be used in other places as well.

The old method is marked as deprecated.

Resolves: #89756
Releases: master
Change-Id: I5d793138324b315f4ad4873687f85b84120e271a
Reviewed-on: https://review.typo3.org/c/Packages/TYPO3.CMS/+/62420


Tested-by: TYPO3com <noreply@typo3.com>
Tested-by: Susanne Moog <look@susi.dev>
Tested-by: Daniel Goerz <daniel.goerz@posteo.de>
Reviewed-by: Susanne Moog <look@susi.dev>
Reviewed-by: Daniel Goerz <daniel.goerz@posteo.de>