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/api/api_provisioning_test.go

@@ -22,6 +22,7 @@ import (
 	"github.com/grafana/grafana/pkg/services/secrets"
 	secrets_fakes "github.com/grafana/grafana/pkg/services/secrets/fakes"
 	"github.com/grafana/grafana/pkg/services/sqlstore"
+	"github.com/grafana/grafana/pkg/services/user"
 	"github.com/grafana/grafana/pkg/setting"
 	"github.com/grafana/grafana/pkg/web"
 )
@@ -372,7 +373,7 @@ func createTestRequestCtx() gfcore.ReqContext {
 		Context: &web.Context{
 			Req: &http.Request{},
 		},
-		SignedInUser: &gfcore.SignedInUser{
+		SignedInUser: &user.SignedInUser{
 			OrgId: 1,
 		},
 	}