[BUGFIX] Backup last typolink URL before processing ATagParams

This prevents typolinks called in the stdWrap of ATagParams
from modifying the original link URL.

Resolves: #89521
Releases: master, 9.5
Change-Id: Ief6d7c8a7345bab16b98d840e31807e5ab07763d
Reviewed-on: https://review.typo3.org/c/Packages/TYPO3.CMS/+/62126


Tested-by: TYPO3com <noreply@typo3.com>
Tested-by: Oliver Bartsch <bo@cedev.de>
Tested-by: Susanne Moog <look@susi.dev>
Reviewed-by: Oliver Bartsch <bo@cedev.de>
Reviewed-by: Tymoteusz Motylewski <t.motylewski@gmail.com>
Reviewed-by: Susanne Moog <look@susi.dev>