times out and causes test failures in nbb

[barisusakli]

1. Admin Controllers
   should load /admin/extend/plugins:
   Error: Timeout of 50000ms exceeded. For async tests and hooks, ensure "done()" is called; if returning a Promise, ensure it resolves. (/home/runner/work/NodeBB/NodeBB/test/controllers-admin.js)
   at listOnTimeout (internal/timers.js:557:17)
   at processTimers (internal/timers.js:500:7)

[barisusakli]

Cached trending packages
a5f1581

Real issue seems to be the zsets used to generate trending plugins contain 2300 packages, ie 'analytics:' + key + ':daily' and they seem to be populated everytime suggest is called since we can't check if someone really installed a plugin.

The slow parts are here https://github.com/NodeBB/nodebb-package-manager/blob/master/lib/analytics.js#L126-L132.

2300 keys * 7 days multi.zscore calls as more and more plugins get published it gets slower even though some of these plugins are never installed in the past 7 days they are still in the zset 'analytics:' + key + ':daily'