Add test for front page meta tags

I will try to add the tests

I have added the tests but it's failing because the 'Content' meta tags are getting applied to the node set as the front page. Eg: For the front page, the og:type is configured as 'website' and for other pages it's cofigured as 'article'. After creating a node and setting it as the site's front page, the og:type is still appearing as 'article' when opening the front page. This happens only while running the tests. If I try this directly from the ui (Create a new node and set it as the front page) , front page tags are coming properly

Also, the front page meta tag config was using 'field_image' to get the image meta tags like image_src, og:image, etc. But the default homepage is a basic page, and the basic page content type has 'field_featured_image' instead of 'field_image'. I’m not sure if it was a mistake or was intentionally set (since 'field_image' field exists in the article content type), but I’ve updated it in this PR as well.

Moving to 'Needs review' so the maintainers can provide their insights on #4.

Hmm.. in my local only the 'og:type' validation part of the test if failing. But here it's failing while opening the front page 🧐

🤔 I'd like to take a crack at this; I have a slightly different approach in mind that should (hopefully) not require a ton of refactoring in the test.

Moving to Needs Work for the comment in #7