API: Datasource endpoint should return 400 bad request if id and orgId is invalid (#32392) (#32397)

* return 400 bad request if id and orgId is invalid

Signed-off-by: bergquist <carl.bergquist@gmail.com>
Co-authored-by: Arve Knudsen <arve.knudsen@gmail.com>
(cherry picked from commit eb241b960f)

Co-authored-by: Carl Bergquist <carl.bergquist@gmail.com>

pkg/api/datasources.go

@@ -72,6 +72,9 @@ func GetDataSourceById(c *models.ReqContext) response.Response {
 		if errors.Is(err, models.ErrDataSourceNotFound) {
 			return response.Error(404, "Data source not found", nil)
 		}
+		if errors.Is(err, models.ErrDataSourceIdentifierNotSet) {
+			return response.Error(400, "Datasource id is missing", nil)
+		}
 		return response.Error(500, "Failed to query datasources", err)
 	}