Metaclasses with type annotated attributes do not add `__annotations__ = {}` to derived classes.

Bug report

Bug description:

This can cause odd behaviour for subclasses which then propagate their parent's annotations rather than their own.

class MyType(type):
    METACLASS_VAR: int = 1

class A(metaclass=MyType):
    value: str = "HI"

class B(A):
    pass

B.__annotations__  # {"value": str} instead of {}; but if you remove the type annotation in `MyType`, you get {}

This issue only seems to affect versions prior to 3.14

CPython versions tested on:

3.10, 3.13, 3.14

Operating systems tested on:

Linux

Start with the reported MyType, A, and B reproducer on CPython 3.10 and 3.13, comparing it with 3.14. Trace how type-annotated attributes on the metaclass affect the derived class's annotations. Done means subclasses like B receive their own empty annotations dictionary rather than inheriting A's annotations, with behavior verified on Linux.