Add stale action to close older issues/PR that are more than one year inactive (#32403)

Summary:
Pull Request resolved: https://github.com/facebook/react-native/pull/32403

As the title says, we should cleanup issues that are really stale (i.e. more than one year inactive).
I ended up using actions/stale which is the first party solution for this.

Changelog:
[Internal] [Changed] - Add stale GitHub action

Reviewed By: hramos

Differential Revision: D31653083

fbshipit-source-id: 48538a571183f9ff28a23e7d1fdd01980581de35