All the links with target _blank in the assessments results should inform users the link opens in a new tab

[afercia]

In the assessment results, most (all?) of the results contain links:

These links use target="_blank" but don't use any text to inform users the link is going to open in new browser's tab. Additionally, links that don't point to yoast.com (if any) should use rel="noopener".

Re: the first part, we have PHP utilities (in Yoast SEO) and JS utilities (in yoast-components) to generate the visually hidden text (Opens in a new browser tab). Suggested: add a function to Shortlinker to generate the text and closing </a> tag and replace the hardcoded </a> across the codebase.