[TASK] Extend workspaces functional tests concerning move-placeholders

The "modify" functional tests are extended concerning move-placeholders:
* changeContentSortingAndDeleteMovedRecord
  * in a draft workspace
  * change sorting of element on the same page
  * delete the moved element
* changeContentSortingAndDeleteLiveRecord
  * in a draft workspace
  * change sorting of element on the same page
  * switch to live workspace
  * delete the moved element

The test results reveal problematic states in the database and are used
to proof correct and complete changes of further DataHandler changes in
that regard.

Resolves: #69969
Releases: master, 6.2
Change-Id: I06863ba17e74a698833a665d73269951fed9392e
Reviewed-on: http://review.typo3.org/43430


Reviewed-by: Oliver Hader <oliver.hader@typo3.org>
Tested-by: Oliver Hader <oliver.hader@typo3.org>