[TASK] Destroy install tool session on backend user logout

If a system maintainer used the install tool from within the
backend, the session is now destroyed on logout explicitely.

Resolves: #86249
Resolves: #85404
Releases: master
Change-Id: I6bf4f2a724ec85b60854e8f92c00a10e7614f140
Reviewed-on: https://review.typo3.org/58297


Reviewed-by: Benni Mack <benni@typo3.org>
Tested-by: Benni Mack <benni@typo3.org>
Reviewed-by: Andreas Fernandez <a.fernandez@scripting-base.de>
Tested-by: TYPO3com <no-reply@typo3.com>
Tested-by: Andreas Fernandez <a.fernandez@scripting-base.de>