[ie/francetv] Fix m3u8 formats extraction

[bashonly]

Per this comment by @boulderob, francetv's HLS formats are generally superior to their DASH formats, and were no longer being extracted after the API changes that were handled by 9749ac7.

This PR also does some much-needed cleanup: removing dead code paths (FranceTVIE hadn't been doing anything with all the catalog params being passed to it since 2021) and removing dead subdomains/hostnames (videos.francetv.fr, sivideo.webservices.francetelevisions.fr) from the URL regex patterns and tests.

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

What is the purpose of your pull request?

• Fix or improvement to an extractor (Make sure to add/update tests)

[bashonly]

I've made a pre-release for ease of testing, which exe/zip users can update to with this command:

yt-dlp --update-to bashonly/yt-dlp@francetv

[boulderob]

Already merged but I can confirm that this is working for me also.