Add test for #9056

Author: jacobtylerwalls

tests/functional/n/no/no_member_exception_group.py

@@ -0,0 +1,8 @@
+"""Indirect tests that ExceptionGroup is inferred."""
+
+try:
+    ex_list = [ValueError("a"), ValueError("b"),  Exception("c")]
+    raise ExceptionGroup("exceptions!", ex_list)
+except* ValueError as exc:
+    assert exc.exceptions
+    assert exc.message

tests/functional/n/no/no_member_exception_group.rc

@@ -0,0 +1,2 @@
+[testoptions]
+min_pyver=3.11