Service Accounts: Separate metrics logic from store (#54085)

* separate stats logic from store

* remove in_teams unused stat

* use init instead

pkg/services/serviceaccounts/models.go

@@ -125,3 +125,8 @@ const (
 	FilterOnlyDisabled      ServiceAccountFilter = "disabled"
 	FilterIncludeAll        ServiceAccountFilter = "all"
 )
+
+type Stats struct {
+	ServiceAccounts int64 `xorm:"serviceaccounts"`
+	Tokens          int64 `xorm:"serviceaccount_tokens"`
+}