(🎁) Support setter defined on subtype

[KotlinIsland]

class A:
    @property
    def foo(self) -> str:
        return "hi"
class B(A):
    @A.foo.setter  # "(A) -> str" has no attribute "setter"  [attr-defined]
    def foo(self, value: str):
        print(value)
B().foo = "a"
B().foo = 1  # no error

Workaround

Define additional prop getter in derived class

class A:
    @property
    def foo(self) -> str:
        return "hi"
class B(A):
    @property
    def foo(self)-> str:
        return super().foo
    @foo.setter
    def foo(self, value: str):
        print(value)
B().foo = "a"
B().foo = 1  # yes error

[A5rocks]

Duplicate of #1465. (or #5936... wow we have a lot of duplicates)