Trying to fix by adding import

Author: afprtclr

src/NServiceBus.AcceptanceTests/Core/OpenTelemetry/Metrics/When_envelope_handler_fails.cs

@@ -8,6 +8,7 @@ namespace NServiceBus.AcceptanceTests.Core.OpenTelemetry.Metrics;
 using NServiceBus.AcceptanceTesting;
 using NServiceBus.Extensibility;
 using NServiceBus.Features;
+using NServiceBus.AcceptanceTests.Core.OpenTelemetry;
 using NUnit.Framework;
 using Conventions = AcceptanceTesting.Customization.Conventions;
 

src/NServiceBus.AcceptanceTests/Core/OpenTelemetry/Metrics/When_envelope_handler_succeeds.cs

@@ -9,6 +9,7 @@ namespace NServiceBus.AcceptanceTests.Core.OpenTelemetry.Metrics;
 using NServiceBus.AcceptanceTesting;
 using NServiceBus.Extensibility;
 using NServiceBus.Features;
+using NServiceBus.AcceptanceTests.Core.OpenTelemetry;
 using NUnit.Framework;
 using Conventions = AcceptanceTesting.Customization.Conventions;