dotnet-counter doesn't display UpDownCounter

[JamesNK]

Description

I'm experimenting with adding metrics to ASP.NET Core (and eventually alongside most or all existing event source counters). See dotnet/aspnetcore#46834

An UpDownCounter<long> created in my app isn't displayed alongside other metrics counters. It appears that publishing data for UpDownCounter and ObserverableUpDownCounter was recently fixed in dotnet/runtime#81041 but there wasn't any logic added to consume the value in CounterMonitor:

diagnostics/src/Tools/dotnet-counters/CounterMonitor.cs

Lines 75 to 110 in e633b84

	if (obj.EventName == "BeginInstrumentReporting")
	{
	HandleBeginInstrumentReporting(obj);
	}
	if (obj.EventName == "HistogramValuePublished")
	{
	HandleHistogram(obj);
	}
	else if (obj.EventName == "GaugeValuePublished")
	{
	HandleGauge(obj);
	}
	else if (obj.EventName == "CounterRateValuePublished")
	{
	HandleCounterRate(obj);
	}
	else if (obj.EventName == "TimeSeriesLimitReached")
	{
	HandleTimeSeriesLimitReached(obj);
	}
	else if (obj.EventName == "HistogramLimitReached")
	{
	HandleHistogramLimitReached(obj);
	}
	else if (obj.EventName == "Error")
	{
	HandleError(obj);
	}
	else if (obj.EventName == "ObservableInstrumentCallbackError")
	{
	HandleObservableInstrumentCallbackError(obj);
	}
	else if (obj.EventName == "MultipleSessionsNotSupportedError")
	{
	HandleMultipleSessionsNotSupportedError(obj);
	}

Also test whether dotnet-monitor works with these counter types.

Configuration

.NET 8 web app publishing counters.

dotnet-counters --version
7.0.410101+f99383213ea19741908f5aa3cf0ed400db2e5f0a

Regression?

Unknown

Other information

cc @noahfalk