test(zipapp): allow macOS libpython dylibs

Address PR review finding: the runtime-size assertion should mirror the Linux-only .so exclusion. macOS hermetic runtimes intentionally retain libpython dylibs, so only reject libpython shared-object entries.

Co-authored-by: Copilot Autofix powered by AI <175728472+Copilot@users.noreply.github.com>

Author: gfrankliu

tests/py_zipapp/venv_zipapp_test.py

@@ -85,7 +85,10 @@ def test_zipapp_structure(self):
             # On Windows, pyvenv.cfg and bin/python3 are generated at runtime.
             if os.name != "nt":
                 self.assertFalse(
-                    any("/lib/libpython" in name for name in namelist),
+                    any(
+                        "/lib/libpython" in name and ".so" in name
+                        for name in namelist
+                    ),
                     "Statically linked Python should not bundle libpython",
                 )
                 self.assertHasPathMatchingSuffix(namelist, "/pyvenv.cfg")