Add more defaults to the stdlib (#9606)

Continuing work towards #8988.

The first five commits were created using stubdefaulter on various Python versions; the following commits were all created manually by me to fix various problems. The main things this adds that weren't present in #9501 are:

- Defaults in Windows-only modules and Windows-only branches (because I'm running a Windows machine)
- Defaults in non-py311 branches
- Defaults for float parameters
- Defaults for overloads

stdlib/symtable.pyi

@@ -42,7 +42,7 @@ class Symbol:
         ) -> None: ...
         def is_nonlocal(self) -> bool: ...
     else:
-        def __init__(self, name: str, flags: int, namespaces: Sequence[SymbolTable] | None = ...) -> None: ...
+        def __init__(self, name: str, flags: int, namespaces: Sequence[SymbolTable] | None = None) -> None: ...
 
     def get_name(self) -> str: ...
     def is_referenced(self) -> bool: ...