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/models/alert.go

@@ -5,6 +5,7 @@ import (
 	"time"
 
 	"github.com/grafana/grafana/pkg/components/simplejson"
+	"github.com/grafana/grafana/pkg/services/user"
 )
 
 type AlertStateType string
@@ -159,7 +160,7 @@ type GetAlertsQuery struct {
 	PanelId      int64
 	Limit        int64
 	Query        string
-	User         *SignedInUser
+	User         *user.SignedInUser
 
 	Result []*AlertListItemDTO
 }