[TASK] Deprecate DataHandler->newlog2()

[TASK] Deprecate DataHandler->newlog2()

The "shorthand" method "newlog2()" is deprecated in favor of starting
to integrate a better logging API.

Resolves: #83121
Releases: master
Change-Id: Ieff947e021efb9547fd11d1c527dd072d443d6d8
Reviewed-on: https://review.typo3.org/54796
Reviewed-by: Christian Kuhn <lolli@schwarzbu.ch>
Tested-by: Christian Kuhn <lolli@schwarzbu.ch>
Tested-by: TYPO3com <no-reply@typo3.com>
Reviewed-by: Susanne Moog <susanne.moog@typo3.org>
Tested-by: Susanne Moog <susanne.moog@typo3.org>