[BUGFIX] Use proper editor.css path within TYPO3

GeneralUtility::createVersionNumberedFilename() will process the
provided path. It will execute a file_exists check. The file therefore
needs to be resolvable. Applying getPublicResourceWebPath() beforehand
will result in a web url, which can not be resolved on file system
level.
We therefore remove the unnecessary getPublicResourceWebPath() call.
createVersionNumberedFilename() will resolve EXT: paths anyway.

That way TYPO3 can properly handle the file and add the corresponding
version number if configured.
Furthermore this resolves open_basedir restriction issues on configured
systems.

Resolves: #102619
Releases: main, 12.4
Change-Id: I22dbd2187ee302e9cc1194c0522421fafab3938a
Reviewed-on: https://review.typo3.org/c/Packages/TYPO3.CMS/+/82120


Tested-by: core-ci <typo3@b13.com>
Tested-by: Benjamin Franzke <ben@bnf.dev>
Reviewed-by: Benjamin Franzke <ben@bnf.dev>