Third-party stubs: import from collections.abc where possible (#7637)

stubs/regex/regex/_regex.pyi

@@ -1,5 +1,6 @@
 from _typeshed import Self
-from typing import Any, AnyStr, Callable, Generic, Mapping, TypeVar, overload
+from collections.abc import Callable, Mapping
+from typing import Any, AnyStr, Generic, TypeVar, overload
 from typing_extensions import Literal, final
 
 _T = TypeVar("_T")

stubs/regex/regex/regex.pyi

@@ -1,4 +1,5 @@
-from typing import Any, AnyStr, Callable, overload
+from collections.abc import Callable
+from typing import Any, AnyStr, overload
 
 from . import _regex
 from ._regex_core import *