[TASK] Check symbolic link creation before auto updating

The core updater has been adjusted to not only check file write rights,
but also the ability to create symbolic links before attempting to
run the updater.

Resolves: #78300
Releases: master, 9.5
Change-Id: If14f41d5c0e3a73c883ec49ef601d9d19684f4ed
Reviewed-on: https://review.typo3.org/c/Packages/TYPO3.CMS/+/63617


Reviewed-by: Andreas Fernandez <a.fernandez@scripting-base.de>
Reviewed-by: David Bruchmann <davidbruchmann@gmail.com>
Reviewed-by: Daniel Goerz <daniel.goerz@posteo.de>
Reviewed-by: Georg Ringer <georg.ringer@gmail.com>
Reviewed-by: Benni Mack <benni@typo3.org>
Tested-by: TYPO3com <noreply@typo3.com>
Tested-by: Georg Ringer <georg.ringer@gmail.com>
Tested-by: Benni Mack <benni@typo3.org>