GH-65961: Stop setting or using `__package__` on modules by brettcannon · Pull Request #142046 · python/cpython

```
21 tests altered the execution environment (env changed):
    test_logging test_pathlib test_profile test_pty test_pulldom
    test_pwd test_pyclbr test_pyexpat test_pyrepl test_pystats
    test_resource test_rlcompleter test_robotparser test_sax
    test_sched test_secrets test_select test_set test_shlex test_str
    test_thread

5 tests failed:
    test_capi test_cmd_line_script test_importlib test_repl
    test_sysconfig
```