Override analytics block instead of partial (#8656)

This extends the default analytics block instead of replacing
the entire partial, so that we can use other mkdocs-material
behaviors.

docs/overrides/main.html

@@ -1,4 +1,5 @@
 {% extends "base.html" %}
+
 {% block announce %}
 <div style="color: white;">
   <a href="https://github.com/PrefectHQ/prefect/blob/main/RELEASE-NOTES.md#release-283" style="color: #07e798;">
@@ -19,3 +20,14 @@
     </a>
   </div> -->
 {% endblock %}
+
+{% block analytics %}
+  {{ super() }}
+
+  <script>
+    !function(){var analytics=window.analytics=window.analytics||[];if(!analytics.initialize)if(analytics.invoked)window.console&&console.error&&console.error("Segment snippet included twice.");else{analytics.invoked=!0;analytics.methods=["trackSubmit","trackClick","trackLink","trackForm","pageview","identify","reset","group","track","ready","alias","debug","page","once","off","on","addSourceMiddleware","addIntegrationMiddleware","setAnonymousId","addDestinationMiddleware"];analytics.factory=function(e){return function(){var t=Array.prototype.slice.call(arguments);t.unshift(e);analytics.push(t);return analytics}};for(var e=0;e<analytics.methods.length;e++){var key=analytics.methods[e];analytics[key]=analytics.factory(key)}analytics.load=function(key,e){var t=document.createElement("script");t.type="text/javascript";t.async=!0;t.src="https://cdn.segment.com/analytics.js/v1/" + key + "/analytics.min.js";var n=document.getElementsByTagName("script")[0];n.parentNode.insertBefore(t,n);analytics._loadOptions=e};analytics._writeKey="xDLAoTXsNYpC4Y6JucKnJ8W1MYBuyAbD";;analytics.SNIPPET_VERSION="4.15.3";
+    analytics.load("xDLAoTXsNYpC4Y6JucKnJ8W1MYBuyAbD");
+    analytics.page();
+    }}();
+  </script>
+{% endblock %}

mkdocs.yml

@@ -274,7 +274,7 @@ extra:
     version:
         provider: mike
     analytics:
-        provider: custom
+        provider: google
         property: G-3M31G9B0QJ
     social:
         - icon: fontawesome/brands/slack
@@ -294,4 +294,4 @@ extra:
         - icon: fontawesome/brands/docker
           link: https://hub.docker.com/r/prefecthq/prefect/
         - icon: fontawesome/brands/python
-          link: https://pypi.org/project/prefect/
+          link: https://pypi.org/project/prefect/