[3.14] gh-136380: Fix import behavior for `concurrent.futures.InterpreterPoolExecutor` (GH-136381) (#136420)

gh-136380: Fix import behavior for `concurrent.futures.InterpreterPoolExecutor` (GH-136381)
(cherry picked from commit 490eea02819ad303a5042529af7507b7b1fdabdc)

Co-authored-by: AN Long <aisk@users.noreply.github.com>
Co-authored-by: Serhiy Storchaka <storchaka@gmail.com>
Co-authored-by: Peter Bierma <zintensitydev@gmail.com>
Co-authored-by: sobolevn <mail@sobolevn.me>