[BUGFIX] Use correct identifier for copyFile permission

Update the TCA to provide correct defaults for file and folder
permissions of BE users and groups.

Resolves: #76033
Releases: master, 7.6
Change-Id: I4cbc8c28d89e6dc23d415eb95fe851742e599068
Reviewed-on: https://review.typo3.org/47999


Reviewed-by: Andreas Fernandez <typo3@scripting-base.de>
Reviewed-by: Sascha Egerer <sascha@sascha-egerer.de>
Tested-by: Sascha Egerer <sascha@sascha-egerer.de>
Reviewed-by: Oliver Hader <oliver.hader@typo3.org>
Reviewed-by: Wouter Wolters <typo3@wouterwolters.nl>
Tested-by: Wouter Wolters <typo3@wouterwolters.nl>