Auth: Optimize auth token operations (#74602)
* add token count
* wip
* user count method for tag reporting
* remove non functioning mysql clientFoundRows check
* Update pkg/services/auth/authtest/testing.go
Co-authored-by: Misi <mgyongyosi@users.noreply.github.com>
* add user ID guard
---------
Co-authored-by: Misi <mgyongyosi@users.noreply.github.com>
(cherry picked from commit 77e4d477e5)
Co-authored-by: Jo <joao.guerreiro@grafana.com>