[CI] Move bazel from 11.3 to 11.6 (#84314)
In process of doing so have to:
- Delete `/usr/local/cuda-11.6/cuda-11.6` symlink to self, otherwise Bazel builds fail with
```
ERROR: circular symlinks detected
[start of symlink cycle]
/usr/local/cuda-11.6/cuda-11.6
[end of symlink cycle]
```
- Add `-DCUB_WRAPPED_NAMESPACE=at_cuda_detail"` to `COMMON_COPTS` if building with CUDA, to mimic the behaviour in
https://github.com/pytorch/pytorch/blob/4b8ae047881314580826113f8a224f3fd935b203/cmake/Dependencies.cmake#L1664-L1668
Pull Request resolved: https://github.com/pytorch/pytorch/pull/84314
Approved by: https://github.com/ngimel, https://github.com/atalman
