Remove uses of type() part 2

[ailzhang]

I'm mostly done with cleaning up test/ folder. There're a bunch of remaining callsites but they're "valid" in testing type() functionalities. We cannot remove them until it's fully deprecated.
Next PR would mainly focus on move some callsites to an internal API.

[mruberry]

I didn't even know we had assertEqualTypeString()!

[albanD]

Looks good.
Just random comments.

[dr-ci]

💊 CI failures summary and remediations

As of commit b1dfaa3 (more details on the Dr. CI page):

---

💚 💚 Looks good so far! There are no failures yet. 💚 💚

---

This comment was automatically generated by Dr. CI (expand for details).

Follow this link to opt-out of these comments for your Pull Requests.

Please report bugs/suggestions on the GitHub issue tracker.

See how this bot performed.

This comment has been revised 6 times.

[facebook-github-bot]

@ailzhang has imported this pull request. If you are a Facebook employee, you can view this diff on Phabricator.

[facebook-github-bot]

@ailzhang has imported this pull request. If you are a Facebook employee, you can view this diff on Phabricator.

[facebook-github-bot]

@ailzhang merged this pull request in 86d2870.

[mruberry]

Hey @ailzhang, sorry but had to unland this because it broke the slow-test build:

May 09 04:18:27 ======================================================================
May 09 04:18:27 ERROR [0.002s]: test_addmm_cpu (__main__.TestTorchDeviceTypeCPU)
May 09 04:18:27 ----------------------------------------------------------------------
May 09 04:18:27 Traceback (most recent call last):
May 09 04:18:27   File "/opt/conda/lib/python3.6/site-packages/torch/testing/_internal/common_device_type.py", line 210, in instantiated_test
May 09 04:18:27     return test(self, device_arg)
May 09 04:18:27   File "/opt/conda/lib/python3.6/site-packages/torch/testing/_internal/common_utils.py", line 440, in wrapper
May 09 04:18:27     fn(*args, **kwargs)
May 09 04:18:27   File "/opt/conda/lib/python3.6/site-packages/torch/testing/_internal/common_device_type.py", line 465, in only_fn
May 09 04:18:27     return fn(slf, device, *args, **kwargs)
May 09 04:18:27   File "test_torch.py", line 15062, in test_addmm
May 09 04:18:27     for dtype, prec in types.items():
May 09 04:18:27 AttributeError: module 'types' has no attribute 'items'
May 09 04:18:27 
May 09 04:18:28 ----------------------------------------------------------------------
May 09 04:18:28 Ran 5172 tests in 458.438s
May 09 04:18:28 
May 09 04:18:28 FAILED (errors=1, skipped=5125)

[mruberry]

Part of addressing #37863.