ENH: read_stata return non-nano
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Pre-emptively addresses issues that come up when implementing #55564

cc @bashtage
Does the writer code automatically handle non-ns timestamps? Or does it need some work?  I give some time if needed.
 > Does the writer code automatically handle non-ns timestamps? Or does it need some work? I give some time if needed.

IIUC _datetime_to_stata_elapsed_vec handles this correctly, but another pair of eyeballs would be a good idea @bashtage gentle ping Will take a look later today. 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 @jbrockmendel 