BUG: accept strings in FloatingArray._from_sequence
- [ ] 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

Makes FloatingArray behavior match IntegerArray.  After this we can refactor to share most of coerce_to_array.
yep can you add a note & rebase whatsnew added + green