Add ExceptionHandlerOptions.SuppressLoggingOnHandledException

[JamesNK]

Background and Motivation

A config option to only log in exception handler middleware if the exception is unhandled.

For #54554

Proposed API

namespace Microsoft.AspNetCore.Builder;

public class ExceptionHandlerOptions
{
+    public bool SuppressLoggingOnHandledException { get; set; }
}

Defaults to false.

Usage Examples

app.UseExceptionHandler(new ExceptionHandlerOptions()
{
    SuppressLoggingOnHandledException = true
});

Alternative Designs

Could make the new behavior the default. I don't think that is a good idea for backwards compatibility reasons, and some people might prefer the current behavior.

Risks

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[mitchdenny]

This seems reasonable to me in terms of the feature. Naming wise ... Suppress vs. Disable vs. Other options. I'm assuming you are using a negative property name because you want the default value to be false?

[JamesNK]

Yes. Suppress is common in our APIs: https://learn.microsoft.com/en-us/dotnet/api/?view=aspnetcore-9.0&term=Suppress