[TASK] Show TYPO3 version in system information toolbar item

This patch adds the information about the current TYPO3 version to the
system information toolbar item.

Releases: master
Resolves: #77785
Change-Id: Ib7660351a7c640c03de89d2c15d46934758f494c
Reviewed-on: https://review.typo3.org/49757


Reviewed-by: Nicole Cordes <typo3@cordes.co>
Tested-by: Nicole Cordes <typo3@cordes.co>
Tested-by: TYPO3com <no-reply@typo3.com>
Reviewed-by: Ralf Merz <info@merzilla.de>
Tested-by: Ralf Merz <info@merzilla.de>
Reviewed-by: Michael Oehlhof <typo3@oehlhof.de>
Tested-by: Michael Oehlhof <typo3@oehlhof.de>
Reviewed-by: Daniel Goerz <ervaude@gmail.com>
Tested-by: Daniel Goerz <ervaude@gmail.com>
Reviewed-by: Matthias Vogel <typo3@kanti.de>
Reviewed-by: Stefan Neufeind <typo3.neufeind@speedpartner.de>
Tested-by: Stefan Neufeind <typo3.neufeind@speedpartner.de>