Stdlib: add many missing __hash__ and __eq__ methods (#10464)

stdlib/importlib/machinery.pyi

@@ -148,3 +148,4 @@ class ExtensionFileLoader(importlib.abc.ExecutionLoader):
     def exec_module(self, module: types.ModuleType) -> None: ...
     def get_code(self, fullname: str) -> None: ...
     def __eq__(self, other: object) -> bool: ...
+    def __hash__(self) -> int: ...

stdlib/importlib/metadata/__init__.pyi

@@ -66,6 +66,9 @@ class EntryPoint(_EntryPointBase):
             extras: list[str] = ...,
         ) -> bool: ...  # undocumented
 
+    def __hash__(self) -> int: ...
+    def __eq__(self, other: object) -> bool: ...
+
 if sys.version_info >= (3, 10):
     class EntryPoints(list[EntryPoint]):  # use as list is deprecated since 3.10
         # int argument is deprecated since 3.10