[!!!][TASK] Remove deprecated code from TemplateService

[!!!][TASK] Remove deprecated code from TemplateService

The TemplateService class can now be reduced into smaller parts due
to deprecation removals.

Properties now marked as internal:
- absoluteRootLine
- matchAll
- nextLevel
- outermostRootlineIndexWithTemplate
- rootId
- rowSum
- sectionsMatch
- simulationHiddenOrTime
- sitetitle

Removed properties:
- allowedPaths
- debug
- fileCache
- frames
- MPmap
- whereClause

Methods now marked as protected:
- flattenSetup()
- mergeConstantsFromPageTSconfig()
- prependStaticExtra()
- processIncludes()
- substituteConstants()
- versionOL()

Removed public methods:
- getFileName()
- getFromMPmap()
- init()
- initMPmap_create()
- linkData()
- printTitle()

Resolves: #87207
Releases: master
Change-Id: I264a44ee00450cb9cef23aad365a2266bb7bfa70
Reviewed-on: https://review.typo3.org/59204
Tested-by: TYPO3com <no-reply@typo3.com>
Reviewed-by: Benni Mack <benni@typo3.org>
Tested-by: Benni Mack <benni@typo3.org>
Reviewed-by: Christian Kuhn <lolli@schwarzbu.ch>
Tested-by: Christian Kuhn <lolli@schwarzbu.ch>
Reviewed-by: Anja Leichsenring <aleichsenring@ab-softlab.de>
Tested-by: Anja Leichsenring <aleichsenring@ab-softlab.de>