[TASK] Deprecate GeneralUtility::arrayToLogString()

The method arrayToLogString() within GeneralUtility is deprecated in favor of using
own implementations, based on PSR-3.

Still, the one place where this method was in use - ListSysLogCommand -
moved the logic into its own protected method.

Resolves: #85086
Releases: master
Change-Id: If6815a5ea9e459258408458b97b7ee4ad901bd40
Reviewed-on: https://review.typo3.org/57056


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: Wouter Wolters <typo3@wouterwolters.nl>
Tested-by: Wouter Wolters <typo3@wouterwolters.nl>
Reviewed-by: Georg Ringer <georg.ringer@gmail.com>
Tested-by: Georg Ringer <georg.ringer@gmail.com>