Update tiktok_archiver to get metadata using yt-dlp

[pjrobertson]

The tiktok-downloader is broken for getting metadata (--info flag), so was removed from the project in this commit

The tiktok_archiver should be updated to use yt-dlp to extract the metadata and download the media, similar to how the twitter_archiver works.

Note: a possible alternative solution would be to refactor youtubedl_archiver to default_archiver and allow for custom metadata to be extracted depending on the URL.