Multiplayer SDK 1.1.0

Added more detail in `SessionException` message for `MatchmakerAssignmentFailed` and `MatchmakerAssignmentTimeout` , and exposed the Error property via `ToString()` .

Added 2 new events under ISession, `ISession.PlayerLeaving` and `ISession.PlayerHasLeft` .

Marked the `ISession.PlayerLeft` event as obsolete. It is getting replaced by the new `ISession.PlayerLeaving` event.

Fixed the `ISession` extension method `GetMatchmakingResults` when used with MatchId Matchmaking and non-backfill Multiplay Matchmaking.

Deprecated the `WithBackfillingConfiguration` method and replaced it with the corrected method with the same name and the missing `playerConnectionTimeout` parameter.

Fixed Lobby Vivox interoperability issues around joining certain channel types or joining channels that didn't match a Lobby ID when trying only to use the Vivox SDK while the Lobby SDK was present in the project.

Fixed the Lobby Vivox channel validation to allow for positional 3D channels.

Fixed the Server Query Protocol (SQP) responses from Multiplay Hosting servers to include correct Version and Port.

Fixed potential issue when querying for fleet status in the Deployment Window.

Increased timeout when uploading files from a build.

Fixed Help URL links.