Track # of users with an add-on installed

[Sancus]

There appears to be a daily ping in the following format, to the services URL: https://services.addons.thunderbird.net/api/v3/addons/search/?guid=%7Ba62ef8ec-5fdc-40c2-873c-223b8a6925cc%7D%2C%7Be2fda1a4-762b-4020-b5ad-a41df1933103%7D%2Cdefault-theme%40mozilla.org%2Cthunderbird-compact-light%40mozilla.org%2Cthunderbird-compact-dark%40mozilla.org%2Cgoogle%40search.mozilla.org%2Camazondotcom%40search.mozilla.org%2Cbing%40search.mozilla.org%2Cddg%40search.mozilla.org%2Ctwitter%40search.mozilla.org%2Cwikipedia%40search.mozilla.org%2CImportExportToolsNG%40cleidigh.kokkini.net&lang=en-US

We could use this ping to calculate the number of users that have ANY add-on installed, instead of counting the number of users per add-on, which would provide information on how widely used add-ons are in general.

This requires moving services.addons.thunderbird.net behind Cloudfront and enabling logging, and then writing the AWS Athena queries and statistics compiling/graphing for these, similarly to the other stats we compile.

[Sancus]

This is resolved and now available on the site.