disable AsyncGeneratorModel from inheriting Generator attributes

for example, usual generators have "send", but async don't. They have
   "async" instead.

Author: temyurchenko

astroid/bases.py

@@ -679,7 +679,7 @@ class Generator(BaseInstance):
     # We defer initialization of special_attributes to the __init__ method since the constructor
     # of GeneratorModel requires the raw_building to be complete
     # TODO: This should probably be refactored.
-    special_attributes: objectmodel.GeneratorModel
+    special_attributes: objectmodel.GeneratorBaseModel
 
     def __init__(
         self,

astroid/interpreter/objectmodel.py

@@ -694,12 +694,10 @@ def attr___self__(self):
         return self._instance.bound
 
 
-class GeneratorModel(FunctionModel, ContextManagerModel):
-    def __init__(self):
-        # Append the values from the GeneratorType unto this object.
+class GeneratorBaseModel(FunctionModel, ContextManagerModel):
+    def __init__(self, gen_module: nodes.Module):
         super().__init__()
-        generator = AstroidManager().builtins_module["generator"]
-        for name, values in generator.locals.items():
+        for name, values in gen_module.locals.items():
             method = values[0]
             if isinstance(method, nodes.FunctionDef):
                 method = bases.BoundMethod(method, _get_bound_node(self))
@@ -723,21 +721,14 @@ def attr___doc__(self):
         )
 
 
-class AsyncGeneratorModel(GeneratorModel):
+class GeneratorModel(GeneratorBaseModel):
     def __init__(self):
-        # Append the values from the AGeneratorType unto this object.
-        super().__init__()
-        astroid_builtins = AstroidManager().builtins_module
-        generator = astroid_builtins["async_generator"]
-        for name, values in generator.locals.items():
-            method = values[0]
-            if isinstance(method, nodes.FunctionDef):
-                method = bases.BoundMethod(method, _get_bound_node(self))
+        super().__init__(AstroidManager().builtins_module["generator"])
 
-            def patched(cls, meth=method):
-                return meth
 
-            setattr(type(self), IMPL_PREFIX + name, property(patched))
+class AsyncGeneratorModel(GeneratorBaseModel):
+    def __init__(self):
+        super().__init__(AstroidManager().builtins_module["async_generator"])
 
 
 class InstanceModel(ObjectModel):