Fix GITHUB_ACTION not being set

src/Runner.Worker/Handlers/CompositeActionHandler.cs

@@ -68,13 +68,9 @@ namespace GitHub.Runner.Worker.Handlers
             var compositeGitHubContext = new GitHubContext();
             foreach (var pair in githubContext)
             {
-                compositeGitHubContext[pair.Key] = pair.Value;
+                compositeGitHubContext[pair.Key] = pair.Value.Clone();
             }
 
-            // Download all data
-            var actionManager = HostContext.GetService<IActionManager>();
-            await actionManager.PrepareActionsAsync(ExecutionContext, actionSteps);
-
             foreach (Pipelines.ActionStep actionStep in actionSteps)
             {
                 var actionRunner = HostContext.CreateService<IActionRunner>();
@@ -162,7 +158,6 @@ namespace GitHub.Runner.Worker.Handlers
         {
             ArgUtil.NotNull(compositeSteps, nameof(compositeSteps));
 
-
             // The parent StepsRunner of the whole Composite Action Step handles the cancellation stuff already. 
             foreach (IStep step in compositeSteps)
             {