AspNetCore instrumention sets Span's StatusDescription to Exception message

[cijothomas]

https://github.com/open-telemetry/opentelemetry-dotnet/blob/main/src/OpenTelemetry.Instrumentation.AspNetCore/Implementation/HttpInListener.cs#L422 Is storing Exception.Message as Status.Description.

The semantic convention for http does not prescribe such a behavior. Neither does the Tracing API.

[cijothomas]

https://github.com/open-telemetry/opentelemetry-dotnet-contrib/blob/main/src/OpenTelemetry.Instrumentation.AspNet/Implementation/HttpInListener.cs#L184 similar for asp.net

https://github.com/open-telemetry/opentelemetry-dotnet/blob/main/src/OpenTelemetry.Instrumentation.Http/Implementation/HttpHandlerDiagnosticListener.cs#L335 for httpclient. Maybe better to track separately.

[vishweshbankwar]

completed in #5025