OpenCV with cuDNN

OpenCV [has cuDNN disabled by default](https://github.com/NixOS/nixpkgs/blob/a9bf124c46ef298113270b1f84a164865987a91c/pkgs/development/libraries/opencv/4.x.nix#L42C9-L42C9) in order to reduce the closure size. Could a job with `enableCudnn = true` be added to the CI?