REF: arrays_to_manager dont need names
- [ ] closes #xxxx
- [ ] tests added / passed
- [ ] Ensure all linting tests pass, see [here](https://pandas.pydata.org/pandas-docs/dev/development/contributing.html#code-standards) for how to run them
- [ ] whatsnew entry

In turn this means that create_block_manager_from_arrays doesnt need `columns`, but bc that is in the pseudo-public API the existing version will need to be moved to internals.api before being simplified.  Saving that for a separate step.