[S271837] alias torch._utils_internal (#78597)
Summary:
This is an attempt to fix error:
```
...
File "/mnt/xarfuse/uid-202090/bfc19816-seed-6bb89c2f-e1c0-4c48-8376-657c47aee7ea-ns-4026533122/torchvision/__init__.py", line 5, in <module>
from torchvision import datasets
File "/mnt/xarfuse/uid-202090/bfc19816-seed-6bb89c2f-e1c0-4c48-8376-657c47aee7ea-ns-4026533122/torchvision/datasets/__init__.py", line 1, in <module>
from ._optical_flow import KittiFlow, Sintel, FlyingChairs, FlyingThings3D, HD1 (https://github.com/pytorch/pytorch/commit/2d884f226365f94833df91de532e3a31b0db310d)K
File "/mnt/xarfuse/uid-202090/bfc19816-seed-6bb89c2f-e1c0-4c48-8376-657c47aee7ea-ns-4026533122/torchvision/datasets/_optical_flow.py", line 12, in <module>
from ..io.image import _read_png_16
File "/mnt/xarfuse/uid-202090/bfc19816-seed-6bb89c2f-e1c0-4c48-8376-657c47aee7ea-ns-4026533122/torchvision/io/__init__.py", line 11, in <module>
from ._video_opt import (
File "/mnt/xarfuse/uid-202090/bfc19816-seed-6bb89c2f-e1c0-4c48-8376-657c47aee7ea-ns-4026533122/torchvision/io/_video_opt.py", line 8, in <module>
from ..extension import _load_library
File "/mnt/xarfuse/uid-202090/bfc19816-seed-6bb89c2f-e1c0-4c48-8376-657c47aee7ea-ns-4026533122/torchvision/extension.py", line 20, in <module>
torch.ops.load_library(lib_path)
File "/mnt/xarfuse/uid-202090/bfc19816-seed-6bb89c2f-e1c0-4c48-8376-657c47aee7ea-ns-4026533122/torch/_ops.py", line 250, in load_library
path = torch._utils_internal.resolve_library_path(path)
AttributeError: module 'torch' has no attribute '_utils_internal'
```
I don't completely understand the import mechanism, but I tried this in notebook:
```
# module 'torch' has no attribute '_torch_docs'
import torch._torch_docs
torch._torch_docs.common_args
# works
import torch._torch_docs as t
t.common_args
```
Figured I'd try it to see if it works, because in these files, there does exist a `import torch._utils_internal` at the top which didn't fail.
Test Plan: sc
Differential Revision: D36795248
Pull Request resolved: https://github.com/pytorch/pytorch/pull/78597
Approved by: https://github.com/ngimel
Author
Eric Huang (AI Platform)
