[FEATURE] Support linkvalidatior
Use linkvalidator to check the links of news elements

Change-Id: I42d99316ca21e033ec353a86ac44a6a3d4f33453
Related: #50426
Reviewed-on: https://review.typo3.org/22589
Reviewed-by: Philipp Gampe
Reviewed-by: Georg Ringer
Tested-by: Georg Ringer