Fix `quirk_class_validator` in ZHA unit tests (#90140)

* Fix `quirk_class_validator`

Fix the `quirk_class_validator` for quirks with more than 1 module level

* fix black

* Shorten `quirk_cls` in `clss`

Co-authored-by: TheJulianJES <TheJulianJES@users.noreply.github.com>

* Update comment

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Co-authored-by: TheJulianJES <TheJulianJES@users.noreply.github.com>