Adding rudderstack to our storybook (#52777)

packages/grafana-ui/.storybook/manager-head.html

@@ -1 +1,8 @@
 <link rel="icon" href="public/img/fav32.png" />
+<!--Rudderstack-->
+<script type="text/javascript">
+!function(){var e=window.rudderanalytics=window.rudderanalytics||[];e.methods=["load","page","track","identify","alias","group","ready","reset","getAnonymousId","setAnonymousId"],e.factory=function(t){return function(){var r=Array.prototype.slice.call(arguments);return r.unshift(t),e.push(r),e}};for(var t=0;t<e.methods.length;t++){var r=e.methods[t];e[r]=e.factory(r)}e.loadJS=function(e,t){var r=document.createElement("script");r.type="text/javascript",r.async=!0,r.src="https://rsdk.grafana.com";var a=document.getElementsByTagName("script")[0];a.parentNode.insertBefore(r,a)},e.loadJS(),
+e.load('2CTJQVYkXaWhHHdVGTe5MHZEWge','https://rs.grafana.com'),
+e.page()}();
+</script>
+<!--Rudderstack END-->