Brittle test: `LoggingPreamble_IsSkipped_WhenReusingSharedComponents`

[stevejgordon]

tests/Elastic.OpenTelemetry.Tests/Diagnostics/LoggingTests.cs is sometimes failing with:

[xUnit.net 00:00:00.94]     Elastic.OpenTelemetry.Tests.LoggingTests.LoggingPreamble_IsSkipped_WhenReusingSharedComponents [FAIL]
   ⚡️ FAIL  Elastic.OpenTelemetry.Tests.LoggingTests.LoggingPreamble_IsSkipped_WhenReusingSharedComponents
  
  Error: System.InvalidOperationException : Collection was modified; enumeration operation may not execute.
  
    Failed Elastic.OpenTelemetry.Tests.LoggingTests.LoggingPreamble_IsSkipped_WhenReusingSharedComponents [17 ms]
    Error Message:
     System.InvalidOperationException : Collection was modified; enumeration operation may not execute.
    Stack Trace:
       at System.Collections.Generic.List`1.Enumerator.MoveNext()
     at Elastic.OpenTelemetry.Tests.LoggingTests.LoggingPreamble_IsSkipped_WhenReusingSharedComponents() in /home/runner/work/elastic-otel-dotnet/elastic-otel-dotnet/tests/Elastic.OpenTelemetry.Tests/Diagnostics/LoggingTests.cs:line 58
     at System.RuntimeMethodHandle.InvokeMethod(Object target, Void** arguments, Signature sig, Boolean isConstructor)
     at System.Reflection.MethodBaseInvoker.InvokeWithNoArgs(Object obj, BindingFlags invokeAttr)
    Standard Output Messages: