[BUGFIX] Don't include path for fragment-only links

This adds a similar condition that already existed in the old link
generation for the new routing-based link building. The conditions are
adjusted accordingly.

Change-Id: I467f0ce9695fd33ab1e1545e1ba0728c037d3e93
Resolves: #89068
Releases: master, 9.5
Reviewed-on: https://review.typo3.org/c/Packages/TYPO3.CMS/+/61615


Tested-by: TYPO3com <noreply@typo3.com>
Tested-by: Susanne Moog <look@susi.dev>
Tested-by: Daniel Goerz <daniel.goerz@posteo.de>
Reviewed-by: Susanne Moog <look@susi.dev>
Reviewed-by: Daniel Goerz <daniel.goerz@posteo.de>