[BE] Don't copy CuDNN libs twice (#115872)

- It was installed twice : once in `/usr/local/cuda/lib64` folder and 2nd time in `/usr/lib64`
- And don't install CuDNN headers thrice, only in `/usr/local/cuda/includa`
- Error on unknown CUDA version
- Modify bazel builds to look for cudnn in `/usr/local/cuda` folder
Pull Request resolved: https://github.com/pytorch/pytorch/pull/115872
Approved by: https://github.com/huydhn

WORKSPACE

@@ -243,7 +243,7 @@ new_local_repository(
 new_local_repository(
     name = "cudnn",
     build_file = "@//third_party:cudnn.BUILD",
-    path = "/usr/",
+    path = "/usr/local/cuda",
 )
 
 local_repository(