BUG: DatetimeIndex.intersection losing freq and tz
- [ ] closes #xxxx
- [x] tests added / passed
- [x] passes `black pandas`
- [x] passes `git diff upstream/master -u -- "*.py" | flake8 --diff`
- [x] whatsnew entry

Does this somehow solve https://github.com/pandas-dev/pandas/issues/24362? > Does this somehow solve #24362?

No, but ill make a PR for that in the AM.