Feature or enhancement

When the environment is modified outside Python, os.environ is not updated. I propose adding a new os.environ.refresh() method to manually update os.environ.

Discussion: https://discuss.python.org/t/method-to-refresh-os-environ/54774

Linked PRs

• gh-120057: Add os.environ.refresh() method #120059
• gh-120057: Add os.get_user_default_environ() function #120494
• Revert "gh-120057: Add os.environ.refresh() method (#120059)" #120789
• Revert "gh-120057: Add os.environ.refresh() method (#120059)" #120790
• gh-120057: Rename os.environ.refresh() to invalidate_cache() #120808
• gh-120057: Add os.reload_environ() function #126268