gh-150397: Fix pyexpat bigmem test (GH-151329)

Add missing parameter (size).
(cherry picked from commit 0bbde07)

Co-authored-by: Victor Stinner <vstinner@python.org>

Author: vstinner

Lib/test/test_pyexpat.py

@@ -787,7 +787,7 @@ def test_change_size_2(self):
     @support.requires_resource('cpu')
     @support.requires_resource('walltime')
     @support.bigmemtest(size=2**31, memuse=4, dry_run=False)
-    def test_large_character_data_does_not_crash(self):
+    def test_large_character_data_does_not_crash(self, size):
         # See https://github.com/python/cpython/issues/148441
         parser = expat.ParserCreate()
         parser.buffer_text = True