lib: add lint rule to protect against `Object.prototype.then` pollution
Suggested by @MoLow in https://github.com/nodejs/node/pull/45044#pullrequestreview-1145574585.
Do not update/delete: Banner broadcast message test data
Do not update/delete: Notification broadcast message test data
Suggested by @MoLow in https://github.com/nodejs/node/pull/45044#pullrequestreview-1145574585.