Authn: Stat registration (#62934)

* reorganize auth usage stats

* usage stat privilege elevators

* stat count of modified role

* cfg related info

* add authn anon client

* kv store

* ensure anon enabled is collected even if client is not registered

* fix usage stats test

pkg/api/frontendsettings_test.go

@@ -11,6 +11,7 @@ import (
 	"github.com/stretchr/testify/require"
 
 	"github.com/grafana/grafana/pkg/infra/db"
+	"github.com/grafana/grafana/pkg/infra/usagestats"
 	"github.com/grafana/grafana/pkg/login/social"
 	"github.com/grafana/grafana/pkg/plugins"
 	"github.com/grafana/grafana/pkg/plugins/config"
@@ -64,7 +65,7 @@ func setupTestEnvironment(t *testing.T, cfg *setting.Cfg, features *featuremgmt.
 			PluginsCDNURLTemplate: cfg.PluginsCDNURLTemplate,
 			PluginSettings:        cfg.PluginSettings,
 		}),
-		SocialService: social.ProvideService(cfg, features),
+		SocialService: social.ProvideService(cfg, features, &usagestats.UsageStatsMock{}),
 	}
 
 	m := web.New()