Investigate duplicate events

[lilhoser]

in providerParser.cs:GetManifest - see decoding guid in https://learn.microsoft.com/en-us/windows/win32/api/evntcons/ne-evntcons-etw_provider_trait_type

		//
                // TODO: Research this condition. Rarely, a provider will have
                // seemingly duplicate events.
                //
                // Debug.Assert(!parsedManifest.Events.Contains(manifestEvent));

also applies to ParsedEtwManifestEvent.cs equality comparison:

		//
		// According to https://learn.microsoft.com/en-us/windows/win32/api/evntprov/ns-evntprov-event_descriptor
		//          "For manifest-based ETW, the combination Provider.DecodeGuid +
		//          Event.Id + Event.Version should uniquely identify an event"
		// I have seen cases where event IDs + version for a given provider is not enough,
		// but adding in opcode is. Not sure if "decoding GUID" comes from provider traits
		// and thus has another level of indirection to determine uniqueness.
		//
		return Id == Other.Id && Version == Other.Version &&
			Opcode == Other.Opcode;