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/tsdb/legacydata/contracts.go

@@ -10,8 +10,8 @@ import (
 
 	"github.com/grafana/grafana/pkg/components/null"
 	"github.com/grafana/grafana/pkg/components/simplejson"
-	"github.com/grafana/grafana/pkg/models"
 	"github.com/grafana/grafana/pkg/services/datasources"
+	"github.com/grafana/grafana/pkg/services/user"
 )
 
 // RequestHandler is a data request handler interface.
@@ -37,7 +37,7 @@ type DataQuery struct {
 	Queries   []DataSubQuery
 	Headers   map[string]string
 	Debug     bool
-	User      *models.SignedInUser
+	User      *user.SignedInUser
 }
 
 type DataTable struct {