Add custom CUDNN finding paths for 64bit Windows (#49066)

cmake/cudnn.cmake

@@ -29,11 +29,13 @@ list(
   ${CUDNN_ROOT}
   ${CUDNN_ROOT}/lib64
   ${CUDNN_ROOT}/lib
+  ${CUDNN_ROOT}/lib/x64
   ${CUDNN_ROOT}/lib/${TARGET_ARCH}-linux-gnu
   ${CUDNN_ROOT}/local/cuda-${CUDA_VERSION}/targets/${TARGET_ARCH}-linux/lib/
   $ENV{CUDNN_ROOT}
   $ENV{CUDNN_ROOT}/lib64
   $ENV{CUDNN_ROOT}/lib
+  $ENV{CUDNN_ROOT}/lib/x64
   /usr/lib
   ${CUDA_TOOLKIT_ROOT_DIR}
   ${CUDA_TOOLKIT_ROOT_DIR}/lib/x64)