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/libraryelements/libraryelements_get_all_test.go

@@ -9,6 +9,7 @@ import (
 	"github.com/stretchr/testify/require"
 
 	"github.com/grafana/grafana/pkg/models"
+	"github.com/grafana/grafana/pkg/services/org"
 	"github.com/grafana/grafana/pkg/services/search"
 )
 
@@ -1240,7 +1241,7 @@ func TestGetAllLibraryElements(t *testing.T) {
 			require.Equal(t, "Text - Library Panel", result.Result.Elements[0].Name)
 
 			sc.reqContext.SignedInUser.OrgId = 2
-			sc.reqContext.SignedInUser.OrgRole = models.ROLE_ADMIN
+			sc.reqContext.SignedInUser.OrgRole = org.RoleAdmin
 			resp = sc.service.getAllHandler(sc.reqContext)
 			require.Equal(t, 200, resp.Status())