ENH: 'encoding_errors' argument for read_csv/json
- [x] closes #39450 
- [x] closes #39017
- [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
- [x] whatsnew entry

Should `encoding_errors` be added to `to_csv` and should `errors` in `to_csv` show a `DeprecationWarning` (for consistent naming)?