[BUGFIX] Admin panel fluid debug output shows correct partial path

Feature #76085 introduced an admin panel option which shows red boxes
with section and partials for easier debugging. However sometimes no
partial name is shown in the output, because the retrieved name is not
cleaned correctly.

Resolves: #97509
Related: #76085
Releases: main, 12.4, 11.5
Change-Id: I087e3688fa8d5703c621e182f80b594492c11115
Signed-off-by: J. Peter M. Schuler <j.peter.m.schuler@uni-due.de>
Reviewed-on: https://review.typo3.org/c/Packages/TYPO3.CMS/+/74484


Reviewed-by: Andreas Fernandez <a.fernandez@scripting-base.de>
Reviewed-by: Stefan Bürk <stefan@buerk.tech>
Tested-by: Andreas Fernandez <a.fernandez@scripting-base.de>
Tested-by: Stefan Bürk <stefan@buerk.tech>
Tested-by: core-ci <typo3@b13.com>