Abstract property can't be found by mixins when property is a `attr.ib`

Same context here

The following runs fine:

from abc import ABC, abstractmethod
import attr

class A(ABC):
    @abstractmethod
    def prop(self):
        pass

    def foo(self):
        print(self.prop())

class B:
    def prop(self):
        return 5

class C(B, A):
    pass

C()

Here, C has a function prop inherited from B which is found first in the MRO order so A wouldn't complain about its existence. I tried this with a dataclass as well:

from abc import ABC, abstractmethod
from dataclasses import dataclass, field

class A(ABC):
    @property
    @abstractmethod
    def prop(self):
        pass

    def foo(self):
        print(self.prop())

@dataclass
class B:
    prop: int = field(default=5)

class C(B, A):
    pass

C()

However, this doesn't work with attr:

from abc import ABC, abstractmethod
import attr

@attr.s
class A(ABC):
    @property
    @abstractmethod
    def prop(self):
        pass

    def foo(self):
        print(self.prop())

@attr.s
class B:
    prop: int = attr.ib(default=5)

@attr.s
class C(B, A):
    pass

C()

Running it:

❯ python test.py                                                                                  
Traceback (most recent call last):
  File "test_mro_abstract_property.py", line 22, in <module>
    C()
TypeError: Can't instantiate abstract class C with abstract methods prop

Python version: 3.8.3, attrs version 22.1.0

Start by running the provided Python reproducer using @attr.s, attr.ib, ABC, and abstract property inheritance. Trace why C() remains abstract when B provides prop, and verify that the corrected behavior allows C() to instantiate and resolve prop to 5 without breaking the dataclass comparison case.