Stream actually overrides __new__ so we need to patch it as well (#89592)
Avoids
```
$ python foo.py
Traceback (most recent call last):
File "foo.py", line 3, in <module>
a = torch.cuda.Stream()
File "/home/albandes/local/pytorch/3.8_debug_source/torch/cuda/streams.py", line 34, in __new__
return super(Stream, cls).__new__(cls, priority=priority, **kwargs)
TypeError: object.__new__() takes exactly one argument (the type to instantiate)
```
And now gets
```
$ python foo.py
Traceback (most recent call last):
File "foo.py", line 3, in <module>
a = torch.cuda.Stream()
File "/home/albandes/local/pytorch/3.8_debug_source/torch/cuda/streams.py", line 34, in __new__
return super(Stream, cls).__new__(cls, priority=priority, **kwargs)
File "/home/albandes/local/pytorch/3.8_debug_source/torch/cuda/_utils.py", line 44, in err_fn
raise RuntimeError(
RuntimeError: Tried to instantiate dummy base class Stream
```
Pull Request resolved: https://github.com/pytorch/pytorch/pull/89592
Approved by: https://github.com/soumith
