OpenTelemetry.Instrumentation.Http: avoid duplicate addition of tags and potential conflicting logic on .NET 9+

[antonfirsov]

Component

OpenTelemetry.Instrumentation.Http

Is your feature request related to a problem?

.NET 9 emits standard tags natively, see dotnet/runtime#104251

I didn't have a chance to check how would OpenTelemetry.Instrumentation.Http behave on .NET 9, but I think it would be important to test it and remove duplicate (and potential conflicting) logic from HttpHandlerDiagnosticsListener on .NET 9+.

Note that there are no native enrichment and filtering capabilities yet, users would still need to rely on OpenTelemetry.Instrumentation.Http or on workarounds for that.

What is the expected behavior?

N/A

Which alternative solutions or features have you considered?

N/A

Additional context

N/A

[TimothyMothra]

I'm closing this as a duplicate of #2029