BUG: AmbiguousTimeError when using date_range even when argument ambiguous is set
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- [x] I have confirmed this bug exists on the latest version of pandas.

- [ ] (optional) I have confirmed this bug exists on the master branch of pandas.

---

**Note**: Please read [this guide](https://matthewrocklin.com/blog/work/2018/02/28/minimal-bug-reports) detailing how to provide the necessary information for us to reproduce your bug.

#### Code Sample, a copy-pastable example

```python
>>> import pandas as pd
>>> timezone = 'America/New_York'
>>> start = pd.Timestamp(year=2020, month=11, day=1, hour=1).tz_localize(timezone, ambiguous=False)
>>> pd.date_range(start, periods=2, ambiguous=False)

---------------------------------------------------------------------------
AmbiguousTimeError                        Traceback (most recent call last)
<ipython-input-5-d142fd70e406> in <module>
      2 timezone = 'America/New_York'
      3 start = pd.Timestamp(year=2020, month=11, day=1, hour=1).tz_localize(timezone, ambiguous=False)
----> 4 pd.date_range(start, periods=2, ambiguous=False)

~/anaconda3/envs/oids_tst/lib/python3.6/site-packages/pandas/core/indexes/datetimes.py in date_range(start, end, periods, freq, tz, normalize, name, closed, **kwargs)
   1178         normalize=normalize,
   1179         closed=closed,
-> 1180         **kwargs,
   1181     )
   1182     return DatetimeIndex._simple_new(dtarr, tz=dtarr.tz, freq=dtarr.freq, name=name)

~/anaconda3/envs/oids_tst/lib/python3.6/site-packages/pandas/core/arrays/datetimes.py in _generate_range(cls, start, end, periods, freq, tz, normalize, ambiguous, nonexistent, closed)
    419                 # start/end as well to compare
    420                 if start is not None:
--> 421                     start = start.tz_localize(tz).asm8
    422                 if end is not None:
    423                     end = end.tz_localize(tz).asm8

pandas/_libs/tslibs/timestamps.pyx in pandas._libs.tslibs.timestamps.Timestamp.tz_localize()

pandas/_libs/tslibs/tzconversion.pyx in pandas._libs.tslibs.tzconversion.tz_localize_to_utc()

AmbiguousTimeError: Cannot infer dst time from 2020-11-01 01:00:00, try using the 'ambiguous' argument
```

#### Problem description

When the start time is at the day light saving ambiguous time, date_range raises errors even when the argument 'ambiguous' is set. It should not be raising error when the argument is set.

Issue could be due to the line
https://github.com/pandas-dev/pandas/blob/32ed15d39312193a8c36171f0e120d0f46a26c2c/pandas/core/arrays/datetimes.py#L421
does not correctly pass the argument ambiguous to the function `tz_localize()`.


#### Expected Output

No error

#### Output of ``pd.show_versions()``

AmbiguousTimeError: Cannot infer dst time from 2020-11-01 01:00:00, try using the 'ambiguous' argument

