make sure nettrace exists if required on Linux

Author: VincentBu

src/benchmarks/gc/GC.Infrastructure/GC.Infrastructure/Commands/GCPerfSim/GCPerfSimCommand.cs

@@ -205,7 +205,7 @@ internal static Dictionary<string, ProcessExecutionDetails> ExecuteLocally(GCPer
                         if (configuration.TraceConfigurations?.Type != "none")
                         {
                             // Not checking Linux here since the local run only allows for Windows.
-                            if (!File.Exists(Path.Combine(outputPath, traceName + ".etl.zip")))
+                            if (!File.Exists(Path.Combine(outputPath, traceName + ".etl.zip")) && !File.Exists(Path.Combine(outputPath, traceName + ".nettrace")))
                             {
                                 AnsiConsole.MarkupLine($"[yellow bold] ({DateTime.Now}) The trace for the run wasn't successfully captured. Please check the log file for more details: {Markup.Escape(output)} Full run details: {Path.GetFileNameWithoutExtension(configuration.Name)}: {runInfo.CorerunDetails.Key} for {runInfo.RunDetails.Key} [/]");
                             }