configuration: experiments to the ready phase to allow resolver use (microsoft#196515)

We tried to run an experiment with Remote SSH this iteration, but it
did not work since the assignment 'overlay' was only added once the
workbench is retored, which is after the RA is resolved.

Instead, move it a bit earlier so we can experiment at this point in
the lifecycle.

Author: connor4312

src/vs/workbench/services/configuration/browser/configurationService.ts

@@ -1341,7 +1341,7 @@ class UpdateExperimentalSettingsDefaults extends Disposable implements IWorkbenc
 const workbenchContributionsRegistry = Registry.as<IWorkbenchContributionsRegistry>(WorkbenchExtensions.Workbench);
 workbenchContributionsRegistry.registerWorkbenchContribution(RegisterConfigurationSchemasContribution, LifecyclePhase.Restored);
 workbenchContributionsRegistry.registerWorkbenchContribution(ResetConfigurationDefaultsOverridesCache, LifecyclePhase.Eventually);
-workbenchContributionsRegistry.registerWorkbenchContribution(UpdateExperimentalSettingsDefaults, LifecyclePhase.Restored);
+workbenchContributionsRegistry.registerWorkbenchContribution(UpdateExperimentalSettingsDefaults, LifecyclePhase.Ready);
 
 const configurationRegistry = Registry.as<IConfigurationRegistry>(Extensions.Configuration);
 configurationRegistry.registerConfiguration({