Using ConfigDict or SettingsConfigDict requires an annotation

[antazoey]

When I use other config classes, such as ConfigDict, I get flake8 errors with this plugin.
Attempting to annotate those classes leads to mypy complaining about overrides from base model to submodels, and the pydantic documentation doesn't show extra annotation here.

For example, if I have

    model_config = ConfigDict(arbitrary_types_allowed=True)

flake8 errors with

    PYD002 Non-annotated attribute inside Pydantic model

Changing it to

    model_config: ConfigDict = ConfigDict(arbitrary_types_allowed=True)

is not ideal for a few reasons stated above!