Revert "Change Welcome page contribution activation to LifecyclePhase… (microsoft#203494)

Revert "Change Welcome page contribution activation to LifecyclePhase.Starting (microsoft#201844)"

This reverts commit 0d735d0.

Author: bhavyaus

src/vs/workbench/contrib/welcomeGettingStarted/browser/gettingStarted.contribution.ts

@@ -327,4 +327,4 @@ configurationRegistry.registerConfiguration({
 });
 
 Registry.as<IWorkbenchContributionsRegistry>(WorkbenchExtensions.Workbench)
-	.registerWorkbenchContribution(StartupPageContribution, LifecyclePhase.Starting);
+	.registerWorkbenchContribution(StartupPageContribution, LifecyclePhase.Restored);