Add a way to link to individual Featured Artist tracks

[Walavouchey]

It's currently only possible link to albums¹ (e.g. https://osu.ppy.sh/beatmaps/artists/317#album-1687) in order to make the sidebar album navigation work, but there's no way to get a persistent link for individual tracks.

The use case would be to link to these tracks on the wiki, as is being done in the osu! originals article. The current workaround is to use the track search (e.g. https://osu.ppy.sh/beatmaps/artists/tracks?query=RPG&artist=YooH), but a proper solution would perhaps be either auto-scrolling to the tracks and highlighting them in the artist listings (similar to #8976) or having a separate page for each track, like Spotify or SoundCloud.

Footnotes

1. not the "Songs" album section ↩

[peppy]

Should be a pretty simple one.

[Walavouchey]

noting that apparently the featured artist tag in beatmap info pages gives a track-specific link

in this case it's https://osu.ppy.sh/beatmaps/artists/tracks/42, but it just redirects to sakuraburst's page (https://osu.ppy.sh/beatmaps/artists/8)