MNT: simplify `cibuildwheel` configuration
follow up to https://github.com/pandas-dev/pandas/pull/61981#discussion_r2237723118
This reduce the maintenance burden for `cibuildwheel` config parameters:
- cibw takes `project.requires-python` into account for target selection, so there is no need for explicitly excluding unsupported versions
- using `test-extras` instead of `test-requires` avoids a repetition and keeps `project.optional-dependencies` as the one source of truth in this area

- [N/A] closes #xxxx (Replace xxxx with the GitHub issue number)
- [N/A] [Tests added and passed](https://pandas.pydata.org/pandas-docs/dev/development/contributing_codebase.html#writing-tests) if fixing a bug or adding a new feature
- [x] All [code checks passed](https://pandas.pydata.org/pandas-docs/dev/development/contributing_codebase.html#pre-commit).
- [N/A] Added [type annotations](https://pandas.pydata.org/pandas-docs/dev/development/contributing_codebase.html#type-hints) to new arguments/methods/functions.
- [N/A] Added an entry in the latest `doc/source/whatsnew/vX.X.X.rst` file if fixing a bug or adding a new feature.

Thanks @neutrinoceros 