[BUGFIX] Correctly treat uploaded file when replacing a file

Uploaded files must be moved with the specific PHP function,
otherwise permissions may be wrong.

Resolves: #76205
Releases: master, 7.6
Change-Id: Ic96e6b8927ed5d21131952004805fa72fb8b6857
Reviewed-on: https://review.typo3.org/48181


Reviewed-by: Andreas Fernandez <typo3@scripting-base.de>
Reviewed-by: Frans Saris <franssaris@gmail.com>
Tested-by: Frans Saris <franssaris@gmail.com>
Reviewed-by: Nicole Cordes <typo3@cordes.co>
Reviewed-by: Oliver Hader <oliver.hader@typo3.org>
Tested-by: Oliver Hader <oliver.hader@typo3.org>