Possible duplicate exceptions when using OpenTelemetry

[jamescrosswell]

The following code will result in duplicate exceptions events being reported to Sentry:

        using var activity = Telemetry.ActivitySource.StartActivity("Funny business");
        try
        {
            throw new Exception("test activity.RecordException");
        }
        catch (Exception e)
        {
            SentrySdk.CaptureException(e);
            activity?.RecordException(e);
        }

This is because when our SpanProcessor handles the OpenTelemetry span with the exception recorded in it, we don't have access to the original exception and so we have to recreate a "poor man's" exception instead.

Our deduplication then doesn't, since it matches by reference.

We could come up with a work around this but it makes more sense to address the issue in OpenTelemetry. See open-telemetry/opentelemetry-dotnet#2439 (comment) for details.

[jamescrosswell]

dotnet/runtime#53641 (comment)