SignalR HubConnectionContext constructors changing

## SignalR HubConnectionContext constructors changing

We are changing SignalR's HubConnectionContext constructors to take in an options type rather than multiple parameters to future proof adding options. This removes two constructors in favor of a single constructor which takes an option type.

### Version introduced

3.0

### Old behavior

Prior to 3.0 `HubConnectionContext` had two constructors:

```csharp
public HubConnectionContext(ConnectionContext connectionContext, TimeSpan keepAliveInterval, ILoggerFactory loggerFactory);
public HubConnectionContext(ConnectionContext connectionContext, TimeSpan keepAliveInterval, ILoggerFactory loggerFactory, TimeSpan clientTimeoutInterval);
```

### New behavior

In 3.0 these 2 constructors have been removed and replaced them with a new one:
```csharp
public HubConnectionContext(ConnectionContext connectionContext, HubConnectionContextOptions contextOptions, ILoggerFactory loggerFactory)
```

### Reason for change

This new constructor makes use of a new options object, so we can expand the features of `HubConnectionContext` in the future without making more constructors and breaking changes.

### Recommended action

Instead of calling:
```C#
HubConnectionContext connectionContext = new HubConnectionContext(
    connectionContext, 
    keepAliveInterval: TimeSpan.FromSeconds(15), 
    loggerFactory, 
    clientTimeoutInterval: TimeSpan.FromSeconds(15));
```

They would now call:
```C#
HubConnectionContextOptions contextOptions = new HubConnectionContextOptions()
{
    KeepAliveInterval = TimeSpan.FromSeconds(15),
    ClientTimeoutInterval = TimeSpan.FromSeconds(15)
};
HubConnectionContext connectionContext = new HubConnectionContext(connectionContext, contextOptions, loggerFactory);
```

### Category

ASP.NET Core

### Affected APIs

[`HubConnectionContext.ctor(ConnectionContext, TimeSpan , ILoggerFactory)`](https://docs.microsoft.com/en-us/dotnet/api/microsoft.aspnetcore.signalr.hubconnectioncontext.-ctor?view=aspnetcore-2.2#Microsoft_AspNetCore_SignalR_HubConnectionContext__ctor_Microsoft_AspNetCore_Connections_ConnectionContext_System_TimeSpan_Microsoft_Extensions_Logging_ILoggerFactory_)

[`HubConnectionContext.ctor(ConnectionContext, TimeSpan , ILoggerFactory, TimeSpan)`](https://docs.microsoft.com/en-us/dotnet/api/microsoft.aspnetcore.signalr.hubconnectioncontext.-ctor?view=aspnetcore-2.2#Microsoft_AspNetCore_SignalR_HubConnectionContext__ctor_Microsoft_AspNetCore_Connections_ConnectionContext_System_TimeSpan_Microsoft_Extensions_Logging_ILoggerFactory_)



---
#### Issue metadata

* Issue type: breaking-change

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SignalR HubConnectionContext constructors changing #14845