[SignalR] Client keepalive check is disabled when I debug my hub server

### Is there an existing issue for this?

- [X] I have searched the existing issues

### Describe the bug

Client ping timeout check is disabled when I debug my hub server

### Expected Behavior

I should be able to see `OnDisconnectedAsync` triggered when client does not send out ping messages

### Steps To Reproduce

1. Create a simple Hub server
2. Shorten `ClientTimeoutInterval` to 5 seconds: `services.AddSignalR(o=>o.ClientTimeoutInterval=TimeSpan.FromSeconds(5));`
3. Override OnDisconnectedAsync in the hub and insert a breakpoint there
4. F5 to start debugging my hub
5. OnDisconnectedAsync is never triggered because KeepAlive check is disabled when Debugger is attached: https://github.com/dotnet/aspnetcore/blob/88ee825bca9978df7f1d8c8c09b71b6dffeeb53b/src/SignalR/server/Core/src/HubConnectionContext.cs#L656

### Exceptions (if any)

_No response_

### .NET Version

6.0.203

### Anything else?

_No response_