[3.12] gh-121571: Do not use EnvironmentError in tests, use OSError instead (GH-121572) (#121575)

gh-121571: Do not use `EnvironmentError` in tests, use `OSError` instead (GH-121572)
(cherry picked from commit e2822360da)

Co-authored-by: sobolevn <mail@sobolevn.me>

Lib/test/test_subprocess.py

@@ -1407,7 +1407,7 @@ class ProcessTestCase(BaseTestCase):
         t = threading.Thread(target=open_fds)
         t.start()
         try:
-            with self.assertRaises(EnvironmentError):
+            with self.assertRaises(OSError):
                 subprocess.Popen(NONEXISTING_CMD,
                                  stdin=subprocess.PIPE,
                                  stdout=subprocess.PIPE,