[BUGFIX] Ensure ZipService sets proper permissions recursively

ZipService->extract was introduced for a security patch set
but the permissions are not set correctly, as fixPermissions
receives a directory with a slash at the end, resulting
in "//" for recursive checks.

This patch fixes the issue.

Resolves: #90417
Relates: #90118
Releases: master, 9.5
Change-Id: Ie56ef6a3781b12c9ac2cf9a859ec226f48691d7f
Reviewed-on: https://review.typo3.org/c/Packages/TYPO3.CMS/+/64267


Tested-by: TYPO3com <noreply@typo3.com>
Tested-by: Tymoteusz Motylewski <t.motylewski@gmail.com>
Tested-by: Danilo Caccialanza <supercaccia@bluewin.ch>
Tested-by: Andreas Fernandez <a.fernandez@scripting-base.de>
Reviewed-by: Tymoteusz Motylewski <t.motylewski@gmail.com>
Reviewed-by: Danilo Caccialanza <supercaccia@bluewin.ch>
Reviewed-by: Guido Schmechel <guido.schmechel@brandung.de>
Reviewed-by: Andreas Fernandez <a.fernandez@scripting-base.de>