Fix/fixes get top billionaries code (#11466)

* fix: modify the depracated code and add new tests

* fix: remove test from pr

* fix: remove the useless utc import

* fix: add explicit tz argument

* fix: fixes ruff checking

* Remove UP017 #noqa comments from code

* Update get_top_billionaires.py

* [pre-commit.ci] auto fixes from pre-commit.com hooks

for more information, see https://pre-commit.ci

* Update get_top_billionaires.py

---------

Co-authored-by: Christian Clauss <[email protected]>
Co-authored-by: pre-commit-ci[bot] <66853113+pre-commit-ci[bot]@users.noreply.github.com>