[TASK] Extract target attribute resolving from typolink

The repetitive code for each typolink method is moved to
a separate method in order to allow the LinkService to do the main job.

Resolves: #80602
Releases: master
Change-Id: I7c75a629a12e80258d025d18f6c9600e0872975c
Reviewed-on: https://review.typo3.org/52282


Reviewed-by: Frank Naegler <frank.naegler@typo3.org>
Tested-by: Frank Naegler <frank.naegler@typo3.org>
Tested-by: TYPO3com <no-reply@typo3.com>
Reviewed-by: Christian Kuhn <lolli@schwarzbu.ch>
Tested-by: Christian Kuhn <lolli@schwarzbu.ch>