[!!!][TASK] Remove sys_template.sitetitle DB field and logic

The sys_template.sitetitle field has been deprecated in v10
and is superseded by title handling of site configuration.
The patch removes handling and db field.

Resolves: #91927
Related: #91473
Releases: master
Change-Id: I14f034193a31b7fdb0c37aeca9a485060843cefc
Reviewed-on: https://review.typo3.org/c/Packages/TYPO3.CMS/+/64618


Tested-by: Christian Kuhn <lolli@schwarzbu.ch>
Tested-by: TYPO3com <noreply@typo3.com>
Tested-by: Georg Ringer <georg.ringer@gmail.com>
Reviewed-by: Christian Kuhn <lolli@schwarzbu.ch>
Reviewed-by: Georg Ringer <georg.ringer@gmail.com>