This change removes usages of ObjectManager and general
dependency injection with injection methods across the
install tool (including AJAX actions). Where necessary,
constructor dependency injection has been implemented
with automatic dependency instantiation if not passed
as constructor argument.

Change-Id: I859f07789120f538a1d735f386ff3ba3163bd00e
Resolves: #73605
Releases: master
Reviewed-on: https://review.typo3.org/46883


Reviewed-by: Frank Naegler <frank.naegler@typo3.org>
Tested-by: Frank Naegler <frank.naegler@typo3.org>
Reviewed-by: Christian Kuhn <lolli@schwarzbu.ch>
Tested-by: Christian Kuhn <lolli@schwarzbu.ch>