BUG: IntegerArray/FloatingArray constructors mismatched NAs
- [ ] closes #xxxx
- [x] tests added / passed
- [x] Ensure all linting tests pass, see [here](https://pandas.pydata.org/pandas-docs/dev/development/contributing_codebase.html#pre-commit) for how to run them
- [x] whatsnew entry

Same yak-shaving as #44495 (which turned out to be a dead end for this particular yak, but still a perf bump)