[TASK] Split two functional tests into smaller parts

The EnhancerLinkGeneratorTest and EnhancerSiteGeneratorTest have
524 and 460 tests. Hack these into smaller parts using multiple
files to be better digestible by the test splitter script.

Resolves: #93490
Releases: master
Change-Id: I2b926ed85211d8e19b6509f642e10cf24a5b44cc
Reviewed-on: https://review.typo3.org/c/Packages/TYPO3.CMS/+/67732


Tested-by: Anja Leichsenring <aleichsenring@ab-softlab.de>
Tested-by: TYPO3com <noreply@typo3.com>
Tested-by: core-ci <typo3@b13.com>
Tested-by: Jochen <rothjochen@gmail.com>
Tested-by: Christian Kuhn <lolli@schwarzbu.ch>
Reviewed-by: Anja Leichsenring <aleichsenring@ab-softlab.de>
Reviewed-by: Jochen <rothjochen@gmail.com>
Reviewed-by: Christian Kuhn <lolli@schwarzbu.ch>