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/screenshot/screenshot_test.go

@@ -18,6 +18,7 @@ import (
 	"github.com/grafana/grafana/pkg/components/imguploader"
 	"github.com/grafana/grafana/pkg/models"
 	"github.com/grafana/grafana/pkg/services/dashboards"
+	"github.com/grafana/grafana/pkg/services/org"
 	"github.com/grafana/grafana/pkg/services/rendering"
 	"github.com/grafana/grafana/pkg/setting"
 )
@@ -94,7 +95,7 @@ func TestBrowserScreenshotService(t *testing.T) {
 	renderOpts := rendering.Opts{
 		AuthOpts: rendering.AuthOpts{
 			OrgID:   2,
-			OrgRole: models.ROLE_ADMIN,
+			OrgRole: org.RoleAdmin,
 		},
 		ErrorOpts: rendering.ErrorOpts{
 			ErrorConcurrentLimitReached: true,