`span_range` produces questionable output following DST time change

## Issue Description

I believe the `span_range` function produces erroneous output stemming from the time change to DST in the US.

In the example below at ndx=1, the upper bound for the span is `` when I believe it should be ``.

```
>>> for ndx, x in enumerate(arrow.Arrow.span_range(frame='hour', start=arrow.get('2022-03-13T00:00:00-05:00', tzinfo='US/Eastern'), end=arrow.get('2022-03-14T00:00:00-04:00', tzinfo='US/Eastern'), tz='US/Eastern')):
... print(f"{ndx}: {x}")
...
0: (, )
1: (, )
2: (, )
3: (, )
```

## System Info

- 🖥 **OS name and version**: Ubuntu 18.04.6 LTS
- 🐍 **Python version**: Python 3.6.9
- 🏹 **Arrow version**: arrow==1.2.2

Start by locating Arrow's span_range implementation and reproducing the supplied US/Eastern DST example on the affected version. Compare each returned span with the issue's expected upper bound and verify that the corrected output no longer produces overlapping or duplicated hourly ranges.

Written by the indexing model from the issue text.