Add Apache/Matomo Analytics to grails-data docs and both sets of groovydocs

All html files should have Apache/Matomo analytics

https://grails.apache.org/docs/snapshot/grails-data/
https://grails.apache.org/docs/snapshot/api/
https://grails.apache.org/docs/snapshot/grails-data/api/

```


var _paq = window._paq = window._paq || [];
/* tracker methods like "setCustomDimension" should be called before "trackPageView" */
_paq.push(["setDoNotTrack", true]);
_paq.push(["disableCookies"]);
_paq.push(['trackPageView']);
_paq.push(['enableLinkTracking']);
(function() {
var u="https://analytics.apache.org/";
_paq.push(['setTrackerUrl', u+'matomo.php']);
_paq.push(['setSiteId', '79']);
var d=document, g=d.createElement('script'), s=d.getElementsByTagName('script')[0];
g.async=true; g.src=u+'matomo.js'; s.parentNode.insertBefore(g,s);
})();


```

https://github.com/apache/grails-core/pull/15312 resolved all groovydocs

All documentation under grails-data is still outstanding

Start by reviewing the grails-data documentation pages and the approach used in apache/grails-core#15312 for the groovydocs. Identify the source or generation entry point for the HTML under grails-data, then verify the Matomo snippet appears on all generated pages at the listed documentation URLs.

Written by the indexing model from the issue text.