Import from collections.abc wherever possible (#7635)

stdlib/heapq.pyi

@@ -1,6 +1,7 @@
 from _heapq import *
 from _typeshed import SupportsRichComparison
-from typing import Any, Callable, Iterable, TypeVar
+from collections.abc import Callable, Iterable
+from typing import Any, TypeVar
 
 __all__ = ["heappush", "heappop", "heapify", "heapreplace", "merge", "nlargest", "nsmallest", "heappushpop"]