Attribute "dtype" are different error with testing.assert_frame_equal
Hi,
When trying testing.assert_frame_equal, I get an assert error.
E           Attribute "dtype" are different
E           [left]:  Int64
E           [right]: Int16

However, for assert_frame_equal, I do set the argument `check_dtype=False`.

From traceback, I can see that `assert_extension_array_equal` is being called with `check_dtype=True` which is causing the issue.

I do not have a sample at hand and I will update when I can.

Affected version: 1.1.0
The test cases were / are running fine with 1.0.5