speed up integration tests by not using DbHelper::getTablesInstalled() #17440
Now in DbHelper::getTablesInstalled() we post an event and force load all activated plugins: https://github.com/matomo-org/matomo/blob/4.x-dev/core/Db/Schema/Mysql.php#L453-L458
This is quite a bit more work, it seems. Locally it slows each individual integration test case by about 14s. Removing it speeds the LoaderTest, for example, from 10mins to finish to 1min.