[flake8-bugbear] Implement class-as-data-structure (B903) (#9601)

## Summary

Adds `class-as-data-structure` rule (`B903`). Also compare pylint's `too-few-public-methods` (`PLR0903`).

Took some creative liberty with this by allowing the class to have any
decorators or base classes. There are years-old issues on pylint that
don't approve of the strictness when it comes to these things.

Especially considering that dataclass is a decorator and namedtuple _can
be_ a base class. I feel ignoring those explicitly is redundant all
things considered, but it's not a hill I'm willing to die on!

See: #970 

## Test Plan

`cargo test`

---------

Co-authored-by: Micha Reiser <micha@reiser.io>
Co-authored-by: dylwil3 <dylwil3@gmail.com>

crates/ruff_workspace/src/configuration.rs

@@ -1571,7 +1571,7 @@ mod tests {
     const PREVIEW_RULES: &[Rule] = &[
         Rule::ReimplementedStarmap,
         Rule::SliceCopy,
-        Rule::TooManyPublicMethods,
+        Rule::ClassAsDataStructure,
         Rule::TooManyPublicMethods,
         Rule::UnnecessaryEnumerate,
         Rule::MathConstant,