ENH: Add class to write dta format 117 files
Add export for dta 117 files which add support for long strings
Refactor StataWriter to simplify new writer

closes #16450

- [x] closes #16450
- [x] tests added / passed
- [x] passes `git diff upstream/master -u -- "*.py" | flake8 --diff`
- [x] whatsnew entry
