…ling

Refactors the connection manager.

1. Internally it uses a queue to control concurrency instead of dial tokens
2. A second queue is used for each peer to prevent inividual peers from swamping the dial queue
3. The auto dialler now checks the minimum connection limit when peers disconnect instead of using a timer
4. Auto dialled peers are sorted based on tag value so valuable peers should be re-dialled first
5. Auto dialled peers are dialled in parallel to prevent a slow peer locking up the auto-dial queue
6. allow/deny lists are now `MultiaddrFilter`s
7. A `getDialQueue` method has been added to libp2p to allow inspection of the dial queue though it needs exposing in the interface
8. The connection gater `denyDialMultiaddr` method now only takes a multiaddr

BREAKING CHANGE: some connection manager options have changed - please see the upgrade guide for full details

Co-authored-by: Russell Dempsey <1173416+SgtPooki@users.noreply.github.com>