[flake8-django] Recognize other magic methods (DJ012)

[InSyncWithFoo]

Summary

Resolves #13892.

Test Plan

cargo nextest run and cargo insta test.

[github-actions]

ruff-ecosystem results

Linter (stable)

✅ ecosystem check detected no linter changes.

Linter (preview)

✅ ecosystem check detected no linter changes.

[MichaReiser]

I think we have three options here:

• We change it to preview only so that we can merge it here
• We leave it as is and wait for the 0.10 release to merge it
• We merge it as is because we mainly consider this a bugfix.

I'm leaning toward classifying this as a bugfix and releasing it as part of 0.9 (CC: @AlexWaygood)

[AlexWaygood]

I'm leaning toward classifying this as a bugfix and releasing it as part of 0.9 (CC: @AlexWaygood)

Yeah, that makes sense to me!