CLN: enforce the deprecation of the `Series.argsort` NA behavior
xref #54219
enforced the deprecation of the `Series.argsort` `NA` behavior.

closes https://github.com/pandas-dev/pandas/issues/12694
closes https://github.com/pandas-dev/pandas/issues/43840
This pull request is stale because it has been open for thirty days with no activity. Please [update](https://pandas.pydata.org/pandas-docs/stable/development/contributing.html#updating-your-pull-request) and respond to this comment if you're still interested in working on this. Thanks @natmokval  thanks @mroeschke for reviewing this PR