[BE][Easy][6/19] enforce style for empty lines in import segments in test/ (#129757)

See https://github.com/pytorch/pytorch/pull/129751#issue-2380881501. Most changes are auto-generated by linter.

You can review these PRs via:

```bash
git diff --ignore-all-space --ignore-blank-lines HEAD~1
```

Pull Request resolved: https://github.com/pytorch/pytorch/pull/129757
Approved by: https://github.com/ezyang

test/test_view_ops.py

@@ -1,6 +1,5 @@
 # Owner(s): ["module: tests"]
 import random
-
 import unittest
 from functools import partial
 from itertools import combinations, permutations, product
@@ -8,7 +7,6 @@ from itertools import combinations, permutations, product
 import numpy as np
 
 import torch
-
 from torch.testing import make_tensor
 from torch.testing._internal.common_device_type import (
     dtypes,