[TASK] Upgrade wizard to merge fe_session_data to fe_sessions

Added a upgrade wizard to merge fe_session_data to fe_sessions
in order to avoid loosing session data when introducing the
new session framework.

Resolves: #79721
Releases: master
Change-Id: Iee2eb9b3096d8916382c01d7d1ad90fcc150f397
Reviewed-on: https://review.typo3.org/51850


Reviewed-by: Morton Jonuschat <m.jonuschat@mojocode.de>
Tested-by: Morton Jonuschat <m.jonuschat@mojocode.de>
Tested-by: TYPO3com <no-reply@typo3.com>
Reviewed-by: Christian Kuhn <lolli@schwarzbu.ch>
Tested-by: Christian Kuhn <lolli@schwarzbu.ch>