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/api/dtos/invite.go

@@ -1,12 +1,12 @@
 package dtos
 
-import "github.com/grafana/grafana/pkg/models"
+import "github.com/grafana/grafana/pkg/services/org"
 
 type AddInviteForm struct {
-	LoginOrEmail string          `json:"loginOrEmail" binding:"Required"`
-	Name         string          `json:"name"`
-	Role         models.RoleType `json:"role" binding:"Required"`
-	SendEmail    bool            `json:"sendEmail"`
+	LoginOrEmail string       `json:"loginOrEmail" binding:"Required"`
+	Name         string       `json:"name"`
+	Role         org.RoleType `json:"role" binding:"Required"`
+	SendEmail    bool         `json:"sendEmail"`
 }
 
 type InviteInfo struct {