Move SignedInUser to user service and RoleType and Roles to org (#53445)

* Move SignedInUser to user service and RoleType and Roles to org

* Use go naming convention for roles

* Fix some imports and leftovers

* Fix ldap debug test

* Fix lint

* Fix lint 2

* Fix lint 3

* Fix type and not needed conversion

* Clean up messages in api tests

* Clean up api tests 2

pkg/services/ngalert/schedule/schedule.go

@@ -9,7 +9,6 @@ import (
 	prometheusModel "github.com/prometheus/common/model"
 
 	"github.com/grafana/grafana/pkg/infra/log"
-	"github.com/grafana/grafana/pkg/models"
 	"github.com/grafana/grafana/pkg/services/alerting"
 	"github.com/grafana/grafana/pkg/services/ngalert/api/tooling/definitions"
 	"github.com/grafana/grafana/pkg/services/ngalert/eval"
@@ -17,6 +16,8 @@ import (
 	ngmodels "github.com/grafana/grafana/pkg/services/ngalert/models"
 	"github.com/grafana/grafana/pkg/services/ngalert/state"
 	"github.com/grafana/grafana/pkg/services/ngalert/store"
+	"github.com/grafana/grafana/pkg/services/org"
+	"github.com/grafana/grafana/pkg/services/user"
 	"github.com/grafana/grafana/pkg/setting"
 
 	"github.com/benbjohnson/clock"
@@ -468,9 +469,9 @@ func (sch *schedule) getRuleExtraLabels(ctx context.Context, alertRule *ngmodels
 	extraLabels[prometheusModel.AlertNameLabel] = alertRule.Title
 	extraLabels[ngmodels.RuleUIDLabel] = alertRule.UID
 
-	user := &models.SignedInUser{
+	user := &user.SignedInUser{
 		UserId:  0,
-		OrgRole: models.ROLE_ADMIN,
+		OrgRole: org.RoleAdmin,
 		OrgId:   alertRule.OrgID,
 	}