[ty] Pull types on synthesized Python files created by mdtest (#18539)

crates/ty_python_semantic/resources/mdtest/annotations/any.md

@@ -139,6 +139,8 @@ x: int = MagicMock()
 
 ## Invalid
 
+<!-- pull-types:skip -->
+
 `Any` cannot be parameterized:
 
 ```py

crates/ty_python_semantic/resources/mdtest/annotations/callable.md

@@ -58,6 +58,8 @@ def _(c: Callable[[int, 42, str, False], None]):
 
 ### Missing return type
 
+<!-- pull-types:skip -->
+
 Using a parameter list:
 
 ```py