feat(adapt): only on the PROD website (#11331)

otherwise it can cause unexpected errors
in our end-to-end tests or local testing

dotcom-rendering/src/client/adaptiveSite.ts

@@ -14,6 +14,7 @@ export const shouldAdapt = async (): Promise<boolean> => {
 	if (isServer) return false;
 	if (window.location.hash === '#adapt') return true;
 	if (!window.guardian.config.switches.adaptiveSite) return false;
+	if (window.location.host !== 'www.theguardian.com') return false;
 
 	// only evaluate this code if we want to adapt in response to page performance
 	const { isPerformingPoorly } = await import(