feat: additional features to make configuration simpler

[mmalenic]

This PR is mostly a reorganization and refactor of code, however there are some new features.

Changes

• The storage type can now be automatically deduced:
  • For local storage, it can be determined from the data.
  • For s3 storage, the bucket is determined from the first capture group in the regex.
    • This makes it possible to specify a regex such as '^(?P<bucket>.*)/(?P<key>.*)$' in order to use the first component of the id as the bucket.
• Storage can still be manually configured. The type parameter is removed, and the configuration of storage is now untagged.
• HtsGetFromStorage and Search is much simpler on the htsget-search side - most of the storage resolution now happens in htsget-config.
• Renamed HttpTicketFormatter and removed the UrlFormatter implementation on it, as this concept is represented by the htsget-config LocalStorage.
• Moved htsget types from htsget-search to htsget-config. Most of these should be removed when noodles-htsget based refactor #89 is addressed.
• Additional tests, and more comprehensive server tests which involve multiple resolvers.
• Fix serve_at field not being used when configuring the local data server.

[brainstorm]

Hey Marko, thanks for this!

Slightly concerned about the move to have the s3-storage feature as default, but it might simplify setup, so I'm okay with it. Ship it! ;)