CNNArticleIE Extractor: Update to recognize modern video links

[kylegustavo]

Example URLs:

Landing pages:
https://www.cnn.com/videos
https://www.cnn.com/videos/
https://edition.cnn.com/videos

Specific Videos:
https://www.cnn.com/2024/05/31/sport/video/jadon-sancho-borussia-dortmund-champions-league-exclusive-spt-intl https://edition.cnn.com/2024/06/11/politics/video/inmates-vote-jail-nevada-murray-dnt-ac360-digvid https://www.cnn.com/2024/06/11/style/video/king-charles-portrait-vandalized-activists-foster-intl-digvid

IMPORTANT: PRs without the template will be CLOSED

Description of your pull request and other information

CNNArticleIE currently matches with URLs but fails to extract video. Update CNNArticleIE to work with the way most CNN video links are embedded, and update the tests to include some of these links. The type of URL for this can just use the default extractor. Also updating the regex to capture a date or text before the /video/ subcategory, as many video links are structured this way. Removing old test that has an old article without available media anymore.

Also, removing the CNNBlogsIE Extractor as the CNN Blogs website is now defunct and none of the old links are active anymore.

Fixes #9719

Template

Before submitting a pull request make sure you have:

• At least skimmed through contributing guidelines including yt-dlp coding conventions
• Searched the bugtracker for similar pull requests

In order to be accepted and merged into yt-dlp each piece of code must be in public domain or released under Unlicense. Check all of the following options that apply:

• I am the original author of this code and I am willing to release it under Unlicense
• I am not the original author of this code but it is in public domain or released under Unlicense (provide reliable evidence)

What is the purpose of your pull request?

• Fix or improvement to an extractor (Make sure to add/update tests)
• New extractor (Piracy websites will not be accepted)
• Core bug fix/improvement
• New feature (It is strongly recommended to open an issue first)