For a while now WebAuthn has replaced u2f.
And since web-vault v2.27.0 the connector files for u2f have been removed.
Also, on the official bitwarden server the endpoint to `/two-factor/get-u2f` results in a 404.
- Removed all u2f code except the migration code from u2f to WebAuthn
This is a rather large PR which updates the async branch to have all the
database methods as an async fn.
Some iter/map logic needed to be changed to a stream::iter().then(), but
besides that most changes were just adding async/await where needed.
- Updated some packages
- Updated code related to package updates.
- Disabled User Verification enforcement when WebAuthn Key sends UV=1
This makes it compatible with upstream and resolves #1840
- Fixed a bug where removing an individual WebAuthn key deleted the wrong key.