Tests: Add missing @covers tags for blocks, oembed, and rewrite tests#11532

sagarsdeshmukh wants to merge 1 commit intoWordPress:trunkWordPress/wordpress-develop:trunkfrom

sagarsdeshmukh:add-covers-blocks-oembed-rewritesagarsdeshmukh/wordpress-develop:add-covers-blocks-oembed-rewriteCopy head branch name to clipboard