Recognise the ``@object.__new__`` decorator on a class definition

Bug Report

For the following code:

@object.__new__
class A:
    ...

class B:
    ...

reveal_type(A)
reveal_type(B)

mypy returns:

test.py:8: note: Revealed type is "def () -> test.A"
test.py:9: note: Revealed type is "def () -> test.B"

If you print instead of reveal_type it shows that:

<__main__.A object at 0x1081cfb50>
<class '__main__.B'>

Following screenshot shows that ``pyright` does recognise this.

Expected Behavior

Recognise that the @object.__new__ decorator turns A into an instance of A and set that as its type.

Actual Behavior

A is now inferred as Type[A].

Your Environment

• Mypy version used: 0.931
• Mypy command-line flags: None
• Mypy configuration options from mypy.ini (and other config files): None
• Python version used: 3.10
• Operating system and version: MacOS

Start by reproducing the example in test.py with mypy and compare the reveal_type results with the expected runtime behavior. Trace the existing handling of decorators applied to class definitions; done means @object.new makes A infer as an instance of A while B remains a class.