[3.11] gh-108303: Move test_future into its own test_future_stmt subdir (#109368) (#109680)

gh-108303: Move `test_future` into its own test_future_stmt subdir (#109368)

(cherry picked from commit 82505dc)

Co-authored-by: Nikita Sobolev <[email protected]>

Author: vstinner

Lib/test/libregrtest/runtest.py

@@ -141,6 +141,7 @@ def set_env_changed(self):
 
 SPLITTESTDIRS = {
     "test_asyncio",
+    "test_future_stmt",
 }
 
 # Storage of uncollectable objects

Lib/test/test_future_stmt/__init__.py

@@ -0,0 +1,6 @@
+import os
+from test import support
+
+
+def load_tests(*args):
+    return support.load_package_tests(os.path.dirname(__file__), *args)