[BUGFIX] EXT:filelist Fixed exception when creating new text file

The exception does not occur with the LocalDriver.
For testing use the driver mentioned in the forge issue.

Resolves: #83627
Releases: master, 8.7
Change-Id: Iae5fef2cc1ca704998975aba4fb6f5e48aeec4b1
Reviewed-on: https://review.typo3.org/55419


Tested-by: TYPO3com <no-reply@typo3.com>
Reviewed-by: Markus Klein <markus.klein@typo3.org>
Reviewed-by: Henning Liebe <h.liebe@neusta.de>
Reviewed-by: Stefan Neufeind <typo3.neufeind@speedpartner.de>
Tested-by: Stefan Neufeind <typo3.neufeind@speedpartner.de>
Reviewed-by: Jan Stockfisch <jan.stockfisch@googlemail.com>
Tested-by: Jan Stockfisch <jan.stockfisch@googlemail.com>
Reviewed-by: Susanne Moog <susanne.moog@typo3.org>
Tested-by: Susanne Moog <susanne.moog@typo3.org>