tpl/tplimpl/embedded: Wrap the relevant templates with the privacy policy disable check

See #4616

tpl/tplimpl/embedded/templates/google_analytics_async.html

@@ -1,3 +1,5 @@
+{{- $pc := .Page.Site.PrivacyConfig.GoogleAnalytics -}}
+{{- if not $pc.Disable -}}
 {{ with .Site.GoogleAnalytics }}
 <script>
 window.ga=window.ga||function(){(ga.q=ga.q||[]).push(arguments)};ga.l=+new Date;
@@ -5,4 +7,5 @@ ga('create', '{{ . }}', 'auto');
 ga('send', 'pageview');
 </script>
 <script async src='//www.google-analytics.com/analytics.js'></script>
-{{ end }}
+{{ end }}
+{{- end -}}