[TASK] Add unit test to cover ContentObjectRenderer::linkWrap

Add unit test to cover ContentObjectRenderer::linkWrap.

Releases: master
Resolves: #80596
Change-Id: I9cdc5a443e8f9518960bbcbc10d4938877cde5a1
Reviewed-on: https://review.typo3.org/52281


Tested-by: TYPO3com <no-reply@typo3.com>
Reviewed-by: Wouter Wolters <typo3@wouterwolters.nl>
Tested-by: Wouter Wolters <typo3@wouterwolters.nl>
Reviewed-by: Georg Ringer <georg.ringer@gmail.com>
Tested-by: Georg Ringer <georg.ringer@gmail.com>