BUG - pd.concat with all Series on axis=1 ignores the `names` argument (Issue: 23490)
- [x] closes #23490
- [x] tests added / passed
- [ ] passes `git diff upstream/master -u -- "*.py" | flake8 --diff`
- [x] whatsnew entry

Fix issue described in #23490, and add tests to catch this case.