TST: update incorrectly defined fixtures
handles the deprecationwarning messages and allows "pytest pandas" to proceed. (see issue #34970)
Hello @pizzathief! Thanks for opening this PR. We checked the lines you've touched for [PEP 8](https://www.python.org/dev/peps/pep-0008) issues, and found:

* In the file [`pandas/tests/extension/json/array.py`](https://github.com/pandas-dev/pandas/blob/ebd36cdd66e8d91cf9530626464296668c0bb9c3/pandas/tests/extension/json/array.py):

> [Line 14:42](https://github.com/pandas-dev/pandas/blob/ebd36cdd66e8d91cf9530626464296668c0bb9c3/pandas/tests/extension/json/array.py#L14): [E241](https://duckduckgo.com/?q=pep8%20E241) multiple spaces after ','
> [Line 16:38](https://github.com/pandas-dev/pandas/blob/ebd36cdd66e8d91cf9530626464296668c0bb9c3/pandas/tests/extension/json/array.py#L16): [E241](https://duckduckgo.com/?q=pep8%20E241) multiple spaces after ','

* In the file [`pandas/tests/groupby/test_whitelist.py`](https://github.com/pandas-dev/pandas/blob/ebd36cdd66e8d91cf9530626464296668c0bb9c3/pandas/tests/groupby/test_whitelist.py):

> [Line 94:1](https://github.com/pandas-dev/pandas/blob/ebd36cdd66e8d91cf9530626464296668c0bb9c3/pandas/tests/groupby/test_whitelist.py#L94): [E302](https://duckduckgo.com/?q=pep8%20E302) expected 2 blank lines, found 1
> [Line 102:1](https://github.com/pandas-dev/pandas/blob/ebd36cdd66e8d91cf9530626464296668c0bb9c3/pandas/tests/groupby/test_whitelist.py#L102): [E305](https://duckduckgo.com/?q=pep8%20E305) expected 2 blank lines after class or function definition, found 1

* In the file [`pandas/tests/indexes/datetimes/test_tools.py`](https://github.com/pandas-dev/pandas/blob/ebd36cdd66e8d91cf9530626464296668c0bb9c3/pandas/tests/indexes/datetimes/test_tools.py):

> [Line 1544:1](https://github.com/pandas-dev/pandas/blob/ebd36cdd66e8d91cf9530626464296668c0bb9c3/pandas/tests/indexes/datetimes/test_tools.py#L1544): [E302](https://duckduckgo.com/?q=pep8%20E302) expected 2 blank lines, found 1
> [Line 1549:1](https://github.com/pandas-dev/pandas/blob/ebd36cdd66e8d91cf9530626464296668c0bb9c3/pandas/tests/indexes/datetimes/test_tools.py#L1549): [E302](https://duckduckgo.com/?q=pep8%20E302) expected 2 blank lines, found 1

* In the file [`pandas/tests/series/test_analytics.py`](https://github.com/pandas-dev/pandas/blob/ebd36cdd66e8d91cf9530626464296668c0bb9c3/pandas/tests/series/test_analytics.py):

> [Line 1794:14](https://github.com/pandas-dev/pandas/blob/ebd36cdd66e8d91cf9530626464296668c0bb9c3/pandas/tests/series/test_analytics.py#L1794): [W291](https://duckduckgo.com/?q=pep8%20W291) trailing whitespace
> [Line 1796:1](https://github.com/pandas-dev/pandas/blob/ebd36cdd66e8d91cf9530626464296668c0bb9c3/pandas/tests/series/test_analytics.py#L1796): [E302](https://duckduckgo.com/?q=pep8%20E302) expected 2 blank lines, found 1

