Add missing required_derivative_scheme
requested to merge issue/az_blob_fs-3460622:3460622-imagestyledownloadcontrollerdeliver-now-takes into 8.x-2.x
Closes #3460622
Per https://www.drupal.org/node/3346038 we need to add the required_derivative_scheme argument to the controller request. I simply followed the example from the notice to add the azblob scheme to the route configuration.