Enable pyright for all Python 3 stubs (#5597)

* pyright: disable reportUnknownParameterType

Unknown parameter types are preferred over Any annotations for
incomplete stubs. Especially larger stubs are expected to be
incomplete for some time and it would be a shame to lose the
other pyright warnings for those stubs.

* Also disable reportUnknownVariableType

Fix problems with tkinter

* Disable reportUnknownMemberType

Fix pyright problems

stdlib/tkinter/ttk.pyi

@@ -2,7 +2,7 @@ import _tkinter
 import sys
 import tkinter
 from tkinter.font import _FontDescription
-from typing import Any, Callable, Dict, List, Optional, Tuple, Union, overload
+from typing import Any, Callable, Dict, Optional, Tuple, Union, overload
 from typing_extensions import Literal, TypedDict
 
 def tclobjs_to_py(adict): ...