IOExceptions caused by client disconnects are noisy on HttpSysServer

[avparuch]

Describe the bug

When a client abruptly disconnects, the IO exceptions on the server side are logged as "errors" under .NET runtime. There is nothing the server can do about client disconnects. This is happening due to this line :

aspnetcore/src/Servers/HttpSys/src/RequestProcessing/RequestStream.cs

Lines 288 to 289 in ff9ed0f

	Exception exception = new IOException(string.Empty, new HttpSysException((int)statusCode));
	Log.ErrorWhenReadAsync(Logger, exception);

.

These IO Exceptions due to client disconnects are not reported as errors on IIS.

To Reproduce

1. Fire up any HttpSysServer sample project in Visual Studio: https://github.com/dotnet/AspNetCore.Docs/tree/main/aspnetcore/fundamentals/servers/httpsys/samples/3.x/SampleApp

2. Send requests to both servers and abruptly disconnect your client. I've attached a simple TCPClient I used.
   TCPClient.zip

3. You will notice the exceptions listed below emitted as errors under ".NET Runtime"

Exceptions (if any)

1. ReadAsync

Exception: 
System.IO.IOException
 ---> Microsoft.AspNetCore.Server.HttpSys.HttpSysException (1): Incorrect function. 
   --- End of inner exception stack trace ---

2. ReadAsync

Exception: 
System.IO.IOException
 ---> Microsoft.AspNetCore.Server.HttpSys.HttpSysException (64): The specified network name is no longer available.- 
   --- End of inner exception stack trace ---
-->

3. ReadAsync

Exception: 
System.IO.IOException
 ---> Microsoft.AspNetCore.Server.HttpSys.HttpSysException (1229): An operation was attempted on a nonexistent network connection.
   --- End of inner exception stack trace ---

4. ReadAsync

Microsoft.AspNetCore.Server.HttpSys.HttpSysListener[31]
Exception: 
System.IO.IOException
---> Microsoft.AspNetCore.Server.HttpSys.HttpSysException (1229): An operation was attempted on a nonexistent network connection.
--- End of inner exception stack trace ---

This is a screenshot of the errors from Windows EventViewer.

Further technical details

• ASP.NET Core version : .NET 6.0 preview 7.
• Include the output of dotnet --info
• The IDE (VS / VS Code/ VS4Mac) you're running on, and its version