[TASK] Implement LoggerInterface from PSR-3

PSR-3 expects the Logger class to implement a given LoggerInterface.

Resolves: #48880
Releases: 6.2
Change-Id: I5c5b507fc6e157e499b9bf42772c209404968391
Reviewed-on: https://review.typo3.org/21827
Reviewed-by: Helmut Hummel
Tested-by: Helmut Hummel
Reviewed-by: Wouter Wolters
Reviewed-by: Markus Klein
Reviewed-by: Christian Kuhn
Reviewed-by: Georg Ringer
Tested-by: Georg Ringer