Feature Complete

- Add remaining test scenarios
- Refactor implementation
- Add gitignore entry for optimization profiles

src/dotnet/Program.cs

@@ -42,11 +42,9 @@ namespace Microsoft.DotNet.Cli
         public static int Main(string[] args)
         {
             DebugHelper.HandleDebugSwitch(ref args);
-
-            AssemblyLoadContext.Default.SetProfileOptimizationRoot(
-                new MulticoreJitProfilePathCalculator().MulticoreJitProfilePath);
-            AssemblyLoadContext.Default.StartProfileOptimization("dotnet");
-
+            
+            new MulticoreJitActivator().TryActivateMulticoreJit();
+            
             if (Env.GetEnvironmentVariableAsBool("DOTNET_CLI_CAPTURE_TIMING", false))
             {
                 PerfTrace.Enabled = true;