Fix UP008 nested class matching

[charliermarsh]

Summary

UP008 (super-call-with-parameters) is triggering inside nested classes when the super() call references the inner class name, which is actually a NameError:

For example, this should not trigger, since Inner isn't a valid reference:

class Outer:
    class Inner(Base):
        def method(self):
            super(Inner, self).__init__()

Closes #24001.

[astral-sh-bot]

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