TST: groupby with daily frequency fails with NonExistentTimeError on clock change day in Brazil
- [x] closes #23742
- [x] tests added / passed
- [x] passes `git diff upstream/master -u -- "*.py" | flake8 --diff`
- [n/a ] whatsnew entry

Hello @simonjayhawkins! Thanks for submitting the PR.

 - There are no PEP8 issues in the file [`pandas/tests/test_resample.py`](https://github.com/simonjayhawkins/pandas/blob/c253028c3eba9c54adc1142971045fd35769de21/pandas/tests/test_resample.py) !

 # [Codecov](https://codecov.io/gh/pandas-dev/pandas/pull/23756?src=pr&el=h1) Report
> Merging [#23756](https://codecov.io/gh/pandas-dev/pandas/pull/23756?src=pr&el=desc) into [master](https://codecov.io/gh/pandas-dev/pandas/commit/db2066b7d31450aaa87f2efcef492162a3d08309?src=pr&el=desc) will **not change** coverage.
> The diff coverage is `n/a`.

[![Impacted file tree graph](https://codecov.io/gh/pandas-dev/pandas/pull/23756/graphs/tree.svg?width=650&token=eZ4WkYLtcO&height=150&src=pr)](https://codecov.io/gh/pandas-dev/pandas/pull/23756?src=pr&el=tree)

```diff
@@           Coverage Diff           @@
##           master   #23756   +/-   ##
=======================================
  Coverage   92.25%   92.25%           
=======================================
  Files         161      161           
  Lines       51390    51390           
=======================================
  Hits        47411    47411           
  Misses       3979     3979
```

| Flag | Coverage Δ | |
|---|---|---|
| #multiple | `90.64% <ø> (ø)` | :arrow_up: |
| #single | `42.31% <ø> (ø)` | :arrow_up: |


------

[Continue to review full report at Codecov](https://codecov.io/gh/pandas-dev/pandas/pull/23756?src=pr&el=continue).
> **Legend** - [Click here to learn more](https://docs.codecov.io/docs/codecov-delta)
> `Δ = absolute <relative> (impact)`, `ø = not affected`, `? = missing data`
> Powered by [Codecov](https://codecov.io/gh/pandas-dev/pandas/pull/23756?src=pr&el=footer). Last update [db2066b...c253028](https://codecov.io/gh/pandas-dev/pandas/pull/23756?src=pr&el=lastupdated). Read the [comment docs](https://docs.codecov.io/docs/pull-request-comments).
 thanks @simonjayhawkins 