[BUGFIX] Correctly retrieve workspace versions

* Clipboard now correctly resolves record localizations of a workspace
* PageLayoutController new correctly determines sub-pages that are new
  in a particular workspace
* SlugHelper & TypoScriptTemplateModuleController can be simplified
  by using WorkspaceRestriction directly
* common function test scenario tree (based on YAML) is introduced
  for ext:backend in order to be used as structure for other tests
* required testing framework changes support version and language
  variants and combination much better now

Resolves: #89138
Releases: master
Change-Id: Ia4b412d48dd3ea92adc60c729ad6feb27c22b812
Reviewed-on: https://review.typo3.org/c/Packages/TYPO3.CMS/+/61663


Tested-by: TYPO3com <noreply@typo3.com>
Tested-by: Daniel Gorges <daniel.gorges@b13.com>
Tested-by: Benni Mack <benni@typo3.org>
Reviewed-by: Daniel Gorges <daniel.gorges@b13.com>
Reviewed-by: Benni Mack <benni@typo3.org>
Reviewed-by: Achim Fritz <af@achimfritz.de>