Clean up autosummary usage
This PR stops numpydoc from producing the summary tables for a class's methods and attributes, preferring to instead rely on autosummary. This approach allows using a class.rst template that isn't relying on hacks to get autosummary to still generate stub pages. In a follow-up PR we can look into removing more of those hacks throughout the code base, this PR is just scoped to resolve the issues with the main class.rst template.

- [x] closes #54454 
- [x] closes https://github.com/pandas-dev/pandas/issues/52937
- [ ] [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).
- [ ] Added [type annotations](https://pandas.pydata.org/pandas-docs/dev/development/contributing_codebase.html#type-hints) to new arguments/methods/functions.
- [ ] Added an entry in the latest `doc/source/whatsnew/vX.X.X.rst` file if fixing a bug or adding a new feature.

In my local builds this PR does not appear to increase the number of warnings at all, suggesting that the changes are safe. I pushed an update to add accessor attributes to the API reference Awesome, thanks @vyasr 