[BUGFIX] Remove prefixed scriptName from urlPath in PageRouter

Remove resolved scriptName with leading slash from url in
PageRouter matchRequest method.

This prevent to change the url to a invalid url if
PageTypeSuffix Decorator with .php is used and a page slugs
ends in index.

Resolves: #94537
Releases: master, 10.4, 9.5
Change-Id: I5057bb6888c228a4ca5b53d363ecf1bc7a6af1c6
Reviewed-on: https://review.typo3.org/c/Packages/TYPO3.CMS/+/69854


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