[BUGFIX] Reimplement pageTS support to selectTree

With TCA type=select and renderType=selectTree certain TCA
config options can be modified via pageTS. Those that influence
the data fetching are now properly handled within the data
provider that gathers the tree items.

Example:
    TCEFORM.pages.categories.config.treeConfig.rootUid = 2

Release: master, 7.6
Resolves: #72961
Change-Id: I6a452c1439b0fd1f59c23b764b35cc8e34de7aef
Reviewed-on: https://review.typo3.org/47083


Reviewed-by: Jigal van Hemert <jigal.van.hemert@typo3.org>
Tested-by: Jigal van Hemert <jigal.van.hemert@typo3.org>
Reviewed-by: Christian Kuhn <lolli@schwarzbu.ch>
Tested-by: Christian Kuhn <lolli@schwarzbu.ch>