divide by 0 for Int64 is inconsistent with int64
```
In [5]: pd.Series([1], dtype='Int64') / pd.Series([0], dtype='Int64')                                                                                                                                                                                                           
Out[5]:                                                                                                                                                                                                                                                                         
0   NaN                                                                                                                                                                                                                                                                         
dtype: float64     
```

Where as

```                                                                                                                                                                                                                                                 
In [6]: pd.Series([1], dtype='int64') / pd.Series([0], dtype='int64')                                                                                                                                                                                                           
Out[6]:                                                                                                                                                                                                                                                                         
0    inf                                                                                                                                                                                                                                                                        
dtype: float64        
```

It's because of this line:

https://github.com/pandas-dev/pandas/blob/0480f4c183a95712cb8ceaf5682c5b8dd02e0f21/pandas/core/arrays/integer.py#L545

Is it intentional for the new extension integer type to have different behavior here?
