Local API: Extract releases on auto-generated artist topic channels

[absidue]

Local API: Extract releases on auto-generated artist topic channels

Pull Request Type

• Feature Implementation

Related issue

#5201 (was actually about Invidious returning a HTTP 500 error when you request those channels but it also covered the albums and singles not showing up)

Description

I originally addressed this in #4129 but then YouTube redesigned the auto-generated artist topic channels before we did a release, so it never actually worked in a release version of FreeTube (which is why I made sure my pull request wasn't listed in the release notes), so I'm counting this as a feature implementation.
This pull request adds support for the new design and layout by displaying albums and singles in the releases tab on auto-generated artist topic channels. That seemed that most fitting tab to display them in, as that's where YouTube displays them when you visit the actual artist's channel (the user one and not the auto-generated one from YouTube Music).

As the small list of albums and singles displayed on the home tab, as the same as the first few in the view all popup, I decided to only extract from the popup but to fallback to the small list on the home tab in case extracting from the popup fails.

Screenshots

Testing

• Only has one page of releases, no load more button (Adele - Topic): https://www.youtube.com/channel/UCRw0x9_EfawqmgDI2IgQLLg
• Has many pages of releases, test that loading more works (David Guetta - Topic): https://www.youtube.com/channel/UCh-4c1ZoBPNP1C8c-7iVvUQ
• Normal user channel, just to make sure I didn't break it (YouTube): https://www.youtube.com/channel/UCBR8-60-B28hp2BmDPdntcQ

Desktop

• OS: Windows
• OS Version: 10
• FreeTube version: bf3304d