* fix: findCUDNN script * Update FindCUDNN.cmake
Fix cuda11 * use cudnn_version.h to detect version when it is available * remove nppi from CUDA11 * use ocv_list_filterout * dnn(cuda): temporary disable CUDNN 8.0
add cuDNN dependency and setup build for cuda4dnn (#14660) * update cmake for cuda4dnn - Adds FindCUDNN - Adds new options: * WITH_CUDA * OPENCV_DNN_CUDA - Adds CUDA4DNN preprocessor symbol for the DNN module * FIX: append EXCLUDE_CUDA instead of overwrite * remove cuDNN dependency for user apps * fix unused variable warning