gh-91231: multiprocessing BaseManager waits 1.0 second (GH-91701)

Shutting down a multiprocessing BaseManager now waits for 1 second until
the process completes, rather than 0.1 second, after the process is
terminated.
(cherry picked from commit a885f10)

Co-authored-by: Victor Stinner <[email protected]>

Author: miss-islington

Lib/multiprocessing/managers.py

@@ -669,7 +669,7 @@ def _finalize_manager(process, address, authkey, state, _Client):
                 if hasattr(process, 'terminate'):
                     util.info('trying to `terminate()` manager process')
                     process.terminate()
-                    process.join(timeout=0.1)
+                    process.join(timeout=1.0)
                     if process.is_alive():
                         util.info('manager still alive after terminate')