Testing to_datetime, converting none to NaT
Addition of a test. Bug was fixed for #35888 somewhere in the main branch, this test just adds a unit test. 

- [x] closes #35888
- [x] tests added / passed
- [x] Ensure all linting tests pass, see [here](https://pandas.pydata.org/pandas-docs/dev/development/contributing.html#code-standards) for how to run them
- [ ] whatsnew entry (not sure if applicable here, can someone advise?) 

Looks like there are linting errors. Please ensure `precommit` is installed and run on your commits to catch these: https://pandas.pydata.org/pandas-docs/stable/development/contributing_codebase.html#pre-commit This pull request is stale because it has been open for thirty days with no activity. Please update or respond to this comment if you're still interested in working on this. Thanks for the PR, but appears this PR has gone stale. Closing for now, but if interested in continuing please merge master and ping and we can reopen.