Use Trace.WriteLine instead of Debug.WriteLine in ConsoleExporter

[utpilla]

The ConsoleExporter does not log anything to the Debug window when ConsolExporterOptions.Target is set to Debug.

The Release Solution Configuration project ignores any Debug class method invocations. However, a Release Solution Configuration project only generates output from a Trace class. (https://docs.microsoft.com/en-US/troubleshoot/dotnet/csharp/trace-and-debug)

Using Trace.WriteLine would log to the Debug window with Release configuration.