[ie/Turbo] Fix turbo extractor

[nbr23]

IMPORTANT: PRs without the template will be CLOSED

Description of your pull request and other information

The Turbo site has changes, and the extractor is currently broken. This fixes it, and adds support for "playlists" (through their RSS feeds).

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
• Checked the code with flake8 and ran relevant tests

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)

[seproDev]

I don't think the extractor should be changed like this to add playlist support. If you do want to add playlist support, that should be done in a dedicated extractor. However, I am not convinced that adding the RSS feeds like this is super useful, as most posts don't contain videos. In its current form, the code also seems broken? Do you have an example where parsing the RSS feeds would be useful?

Looking at the site, it may be worth to split viously.com in to its own embed extractor instead. That would also deal more easily with the case where a single page contains multiple videos. And as a added bonus, it would also work on other sites using that CDN.

[nbr23]

Thanks a bunch for the feedback @seproDev, it all makes perfect sense to me!
I've made this into a viously.com embed extractor (this actually solves the RSS feed thing by design, so I love it).

Removing the old Turbo extractor too since it's broken anyway.

[seproDev]

Please don't force push