[BUGFIX] Revert "Make file paths absolute in GIFBUILDER"

This reverts commit 48e4e495
as this has some side-effects with absolute paths.

Change-Id: Ieb696908e5226d57eedeef7cb5fa8cd7b7ec4ea6
Reverts: #95379
Resolves: #95959
Releases: master, 10.4
Reviewed-on: https://review.typo3.org/c/Packages/TYPO3.CMS/+/72114


Tested-by: core-ci <typo3@b13.com>
Tested-by: Benni Mack <benni@typo3.org>
Reviewed-by: Benni Mack <benni@typo3.org>