[TASK] Reintegrate TYPO3 7 LTS upgrade wizards

As decided during the last RL Product Team meeting in Dusseldorf,
the upgrade wizards from the install tool should stay for two
generations of LTS versions.

This reverts commit 021237d5.

Releases: master
Resolves: #75485
Related: #72367
Change-Id: I2f9d52a5bf0ffeca6843780354e349a5151ddb07
Reviewed-on: https://review.typo3.org/47556


Reviewed-by: Susanne Moog <typo3@susannemoog.de>
Tested-by: Susanne Moog <typo3@susannemoog.de>
Reviewed-by: Christian Kuhn <lolli@schwarzbu.ch>
Tested-by: Christian Kuhn <lolli@schwarzbu.ch>