[dynamo][numpy] Add support for builtin functions (#103457)
In order to be able to run stuff like:
```
def f(x):
a = x.numpy()
return a + a
```
This PR adds a branch in `BuiltinVariable` to handle `NumpyNdarrayVariable` case.
Pull Request resolved: https://github.com/pytorch/pytorch/pull/103457
Approved by: https://github.com/ezyang
